The 40th Monthly Report of the CIES Football Observatory analyses the evolution of competitive balance in 24 European leagues over the last 10 seasons. The study reveals a clear trend towards a greater imbalance. The level of imbalance is particularly marked and on the increase in the big-5 leagues and the Champions League, where the economic divides between teams are very strong.

In 2017/18, big-5 league champions achieved a record of 83.3% of points. This proportion is 10% greater than that measured in 2008/09. Over the ten seasons studied, the biggest average goal difference per match was measured for the UEFA Champions League: 1.58 goals. The premier competition of European football is also that presenting the highest proportion of matches with a goal gap of at least three: 21.0%.

According to the Report, “the concentration of resources goes hand in hand with the concentration of talents. Many teams and leagues are confined to a stepping-stone role for up and coming players. This permits the generation of profits on the transfer market. However, the financial compensations from these transactions are not sufficient to halt the increasing competitive imbalance. The present situation favours the wealthiest clubs. Each day, they increase their sporting, economic and political domination”.

Issue number 242 of the CIES Football Observatory Weekly Post relies on InStat data to present the average effective time of games in 37 European competitions. The Swedish Allsvenskan is the league with the most fluid matches (60.4% of effective time), just ahead the UEFA Champions League (60.2%). The Portuguese Primeira Liga finds itself in the opposite position (50.9%).

The highest effective playing time among the five major European leagues was recorded for the German Bundesliga (58.5%), while the lowest was measured for the Spanish Liga (55.8%). As for the Champions League, Europa League games are more fluid than the average observed at the level of the 35 competitions surveyed: 57.1% of effective time compared to 55.3%.

The highest percentage of minutes in which the ball was in play for clubs in national competitions was recorded for matches of the Swedish side GIF Sundsvall (63.7%). This is 18% more than for games of the Portuguese team Feirense. Club Brugge tops the Champions League table (66.2%), while Borussia Mönchengladbach (62.5%), Liverpool (62.2%), Milan AC (61.2%), Barcelona (60.3%) and Paris St-Germain (60.1%) present the greatest figures for the big-5 leagues.

See also the exclusive CIES Football Observatory Performance Atlas

Issue number 241 of the CIES Football Observatory Weekly Post ranks countries according to the number of domestic league minutes played by their representatives in the big-5. The French (=players who grew up in France) top the rankings (19.7% of total minutes) ahead of the Spaniards (15.2%) and the Germans (9.8%). Overall, players originating from 85 countries have taken part in big-5 league matches so far this season.

In each league surveyed, the highest percentage of minutes per origin was measured for nationals. Nevertheless, the gaps are quite marked: from 62.7% in the French League 1 to only 35.3% in the English Premier League. The figures in the remaining championships are 39.0% in the Italian Serie A, 48.5% in the German Bundesliga and 61.0% in the Spanish Liga.

The greatest values for players originating from abroad were recorded for the French in England (10.9%) and Germany (8.0%), the Brazilians in Italy (7.0%) and France (6.8%), as well as for the Argentineans in Spain (also 6.8%). The English Premier League hosts the representatives from the most countries (54). This figure is 50 in the Serie A, 46 in the Ligue 1, 45 in the Bundesliga and only 40 in the Liga.

A brand new Performance Atlas was launched today on the CIES Football Observatory’s website. Powered with data from the leading company InStat, this unique tool presents exclusive pitch statistics at team level for 35 national competitions across Europe: 30 top division and 5 second division ones. The indicators cover all of the three key areas of the game: defence, passing and attack.

At defensive level, Dinamo Zagreb conceded the least shots on target per domestic league game so far this season (1.6). No club surveyed conceded as few passes in the own third of the pitch as Shakhtar Donetsk (40.8). From an attacking standpoint, the highest figures for shots on target and passes in the opponent third per match were recorded for AFC Ajax (9.1) and Manchester City (206).

At passing level, Chelsea FC tops the table for the percentage of accurate passes (89.9%), while Shakhtar Donetsk ranks first with regard to ball possession (67.0%). The tool also presents the data for the least performing teams. To know more about both the CIES Football Observatory and InStat, please contact us.

Issue number 240 of the CIES Football Observatory Weekly Post presents the ten most fielded U21 players in the big-5 leagues and Portuguese top division. Until last Friday, eleven U21 footballers had played the totality of domestic league minutes. Among them notably are hot prospects such as Rúben Neves, Jules Koundé, Arne Maier, Nikola Milenkovi? and Rúben Dias.

Up to six goalkeepers are to be found in the top 10 rankings: Emil Audero (Sampdoria), Gianluigi Donnarumma (Milan), Paul Bernardoni (Nîmes Olympique), Florian Müller (Mainz), Alban Lafont (Fiorentina) and Unai Simón (Athletic Club). With four representatives, FSV Mainz is the most represented club overall: Aarón Martín, Jean-Philippe Mateta, Florian Müller and Ridle Baku.

Overall, footballers born on or after 1st of January 1997 have played 15.4% of total domestic league minutes in the French Ligue 1, 14.7% in the German Bundesliga, 9.8% in the Italian Serie A, 6.1% in the Spanish Liga, 5.3% in the English Premier League and a mere 5.0% in the Portuguese Primeira Liga. The average age on the pitch per league and club is available in the CIES Football Observatory Demographic Atlas.

The long-term work carried out within the CIES Football Observatory focuses, in particular, on the demographic analysis of the football players’ labour market. The surveys carried out over the past decade allow us to reveal very clear trends. As illustrated in Monthly Report number 39, the footballers’ labour market in Europe is becoming deterritorialised by a decreasing presence of club-trained players, a stronger presence of expatriate footballers and greater mobility.

The percentage of club-trained players in the 31 European divisions surveyed reached a new record low on the 1st of October 2018: 16.9% (-6.3% in ten years). The decrease observed during the last year has been the greatest ever recorded (-1.6%). In parallel, the proportion of expatriates has increased to a record level of 41.5% (+6.8% in ten years). The process of internationalisation of squads has accelerated: from an annual growth of 0.55% between 2009 and 2013 to an average increase of 1.17% between 2014 and 2018.

In the conclusion, the authors state that “more and more teams are geared towards the short-term. In an increasingly segmented and speculative context, club officials tend to optimise financial returns on the transfer market to the detriment of more eminently sporting considerations. The increasing instability that results limits the sporting competitiveness of an ever greater number of teams, to the advantage of the wealthiest and better structured clubs, who increasingly dominate the proceedings”.

Every month, the CIES Football Observatory updates the transfer valuations of big-5 league players using its exclusive algorithm. Issue number 239 of the Weekly Post presents the top 10 list for each position. The highest figure overall was recorded for Kylian Mbappé (€216.5m). Ederson, Umtiti, Alexander-Arnold and Alli top their position’s rankings.

The transfer value of Kylian Mbappé increased by €23m compared to October. This allowed the French prodigy to outrank Harry Kane (€197.3m). The Englishman is now second ahead of Neymar, Mohammed Salah and Philippe Coutinho. Ageing Lionel Messi and Cristiano Ronaldo are now valued at €170.6m and €123.6m respectively.

This research note explains the CIES Football Observatory approach to predict from a scientific perspective the transfer value of professional players. Football stakeholders have increasingly recourse to our unique expertise for different purposes from decision-making to litigation. Do not hesitate to contact us for more information.

Issue number 238 of the CIES Football Observatory Weekly Post highlights clubs having trained the most players currently present in 31 European top divisions and the big-5 leagues respectively. The highest figures were recorded for AFC Ajax for players in the 31 top divisions (77) and Real Madrid for footballers in the big-5 (36).

Compared to 2017, Dynamo Kiev went up from 7th to 2nd place at European level (+ 15 players), reaching Partizan Belgrade (+10). The number of players trained by AFC Ajax also increased (+ 7). At big-5 league level, the top three remained the same. However, Olympique Lyonnais went up from 3rd to 2nd position (35 players, + 4), approaching Real Madrid (36, -4) and outranking Barcelona (34, =).

Following UEFA definition, training clubs are teams where footballers played for at least three seasons between 15 and 21 years. The percentage of minutes played by club-trained footballers in all of the teams from the 31 competitions studied is available in the exclusive CIES Football Observatory Demographic Atlas. More exclusive data is published through Twitter, Facebook and Instagram.

The CIES Football Observatory has developed an exclusive approach to assess the performance of players using the statistics produced by the leading data company OptaPro. Issue number 237 of the Weekly Post presents big-5 league footballers with the highest scores for the last 1,000 domestic league minutes played.

Aymeric Laporte heads the table in the area of rigour (duels), while Étienne Capoue ranks first for recovery (interceptions). Jorginho has the highest score in distribution and Cristiano Ronaldo in shooting. Neymar is at the top in two different tables: take on (dribbles) and chance creation (assists). According to the CIES Football Observatory approach, the Brazilian star is also the big-5 league MVP for the period considered.

At the head of the tables for footballers who played for less than 450 domestic league minutes during current season are Nicolás Otamendi (rigour), Milan Badelj (recovery), Marco Verratti (distribution), Douglas Costa (take on), Kevin de Bruyne (chance creation and MVP), as well as Konstantinos Mitroglou (shooting). More data is available in the exclusive player profile comparator.

Only three clubs in Europe have fielded this season players who have been in the first team squad since more than five years on average: Real Madrid (5.84 years), Barcelona (5.36) and Bayern Munich (5.26). Issue number 236 of the CIES Football Observatory Weekly Post also reveals that another Champions League participant, Viktoria Plze?, is the most stable club outside of the big-5 (4.28 years).

The majority of teams with the highest stability figures are among the most competitive teams in their respective leagues. The opposite holds true for the least stable clubs. The lowest stability levels were recorded for the Croatian team Istra (0.15 years) among the 31 top divisions surveyed and for the Italian side Parma (0.65 years) at big-5 league level.

The data for all teams in the competitions analysed is available in the exclusive CIES Football Observatory Demographic Atlas. Monthly Reports number 34 and number 38 discuss from multiple angles the link between stability and success. More analysis is also presented on a daily basis from our Twitter account. Follow us!

The CIES Football Observatory just published its 38th Monthly Report. The study analyses club strategies in the area of player turnover for the five major European leagues since 2005/06. It reveals that too many changes in line-ups do not constitute a good strategy for optimising results. On the contrary, high turnover levels tend to affect players’ confidence and aggravate the situation.

Seventeen of the twenty teams whose 11 most fielded footballers played for the least percentage of minutes relegated. This is a clear reflection of the real danger faced by clubs of finding themselves trapped in a vicious circle of poor results and instability, and vice versa. The existence of a negative correlation between turnover and points per match confirms the relevance of sticking with a core group of footballers to optimise performance.

The only team in the period studied that fielded less than 20 players over a season was Borussia Mönchengladbach in 2014/15. This did not prevent them from finishing in an excellent third place. That season, the team coached by Lucien Favre also participated in the Europa League, where it reached the last 16. While the achievement of good results reduces the incentives for player turnover, the Report shows that low player turnover in turn favours good results.

Issue number 235 of the CIES Football Observatory Weekly Post highlights teams having fielded the youngest and oldest line-ups in domestic league games so far this season (or since 1st of July for summer leagues). The extreme values at big-5 league level were recorded for two Italian teams: Fiorentina (23.79 years) and Chievo (29.53 years).

Danish side Nordsjaelland fielded the youngest line-ups for the 31 European top division leagues surveyed: 21.36 years on average. Two clubs from the youngest competition analysed, Croatia, rank second and third: NK Rudeš and NK Istra 1961. Four Turkish and three Cypriot teams are among the ten clubs having fielded the oldest line-ups. The highest figure overall was recorded for Europa League participants Apollon Limassol (30.93 years).

The data for all teams from the 31 top divisions studied are available for free in the exclusive CIES Football Observatory Demographic Atlas. This unique tool also presents the on-the-pitch figures for club-trained, expatriates, stability, turnover and height. Enjoy!

Issue number 234 of the CIES Football Observatory Weekly Post ranks clubs across Europe according to the number of minutes per shot attempted. The following teams head the table in the five major European leagues: Manchester City, Juventus, Olympique Lyonnais, Barcelona and Bayern Munich. Slavia Praha tops the rankings outside of the big-5.

So far this season, Manchester City players only needed 4’02” to take a shot. At the opposite end of the table, Huddersfield Town is the Premier League team needing the most minutes to shot: 12’08”. The highest figure overall in the 35 competitions surveyed was recorded for Hamilton Academical (Scotland): 18’12”.

The biggest gap within the same league was observed in Greece: from 5’00” for Olympiacos up to 18’07” for Panetolikos. Data used comes from OptaPro for the big-5 leagues and the English Championship and InStat for the remaining competitions. More information is published from our Twitter account or available on demand at football.observatory@cies.ch.

Manchester City has spent almost €1 billion in transfer indemnities to sign its present squad members (add-ons included). This is the highest figure ever measured for a football team. Issue number 233 of the CIES Football Observatory Weekly Post presents the data for all of the big-5 league teams.

Seven English Premier League teams are in the 11 top positions of the table. The biggest increase compared to last year was measured for Liverpool (from €437M to €704M). The Spanish giants (Barcelona and Real Madrid), Juventus and Paris St-Germain (2nd overall) are the only non-English teams in the top 11. The best-ranked German Bundesliga club, Bayern Munich, is 12th.

Total transfer expenditure to make up the squad for clubs from the five major European leagues went constantly up during the last decade. In 2010, a big-5 league had spent on average €67M to sign its squad members. In 2018, this figure reached a new record high of €161M. During the same period, the amounts invested to assemble the squad by English Premier League clubs went up from €126M to €326M.

The first CIES Football Observatory Weekly Post of the 2018/19 season assesses from an economic perspective paid transfers having taken place during last summer. It highlights that Thibault Courtois went to Real Madrid for a much lower amount than the estimated fair price (-€23 M). Conversely, Chelsea FC paid over the odds to recruit his substitute: Kepa Arrizabalaga (+€45 M).

The fair price corresponds to the average between the estimated cost for the most likely buyer before the transfer and the current transfer value. Both figures were calculated using the exclusive CIES Football Observatory algorithm. The correlation between fees estimated and reported for players transferred for money from big-5 league teams during last transfer window was 75%.

Rodri Hernández, Bryan Cristante, Fabinho Tavares and Clément Lenglet are alongside Thibaut Courtois in the top five for the best operations from an engaging club perspective. For Rodri and Lenglet, the existence of a release clause helped recruiting teams to sign them at a favourable price. As for Kepa Arrizabalaga, the CIES Football Observatory analysis reveals that releasing teams negotiated very well the transfers of Riyad Mahrez, Thilo Kehrer, Yerry Mina and Alex Meret.

The CIES Football Observatory opens its 2018/19 season with the publication of the 37th Monthly Report. The study analyses from a financial standpoint transfer operations carried out by big-5 league clubs since 2010. The total expenditure for 2018 was €5.82 billion (-2.4% compared to 2017), of which €4.71 billion invested during the freshly concluded summer transfer window (-9.9%).

In 2018, the transfer spending of Premier League clubs accounted for 36.5% of the total big-5 league teams expenditure. Since 2010, English top division clubs had a net transfer spend of -€5.71 billion (78.3% of the overall big-5 league deficit). Manchester City has invested the most in transfer indemnities since 2010 (€1.47 billion). It also has the most negative balance sheet for transfer operations (-€1.03 billion).

Despite the slight drop in spending observed in 2018 compared to the 2017 record year, the economic development of the top of the professional football pyramid suggests that a renewed increase of sums invested in transfer fees will happen in the near future. While talent concentration makes possible the assembly of top performing teams, it also reinforces the imbalance of competitions.

Every month since January 2015, the CIES Football Observatory has been publishing reports to inform football stakeholders and all people passionate about the beautiful game on the latest trends observed at sporting, demographic and economic level. For the first time, the papers written during the 2017/18 season were gathered within a “Football Analytics” e-book.

In addition, during the last year, we spared no effort to develop exclusive contents allowing our website users to broaden the scope of their knowledge on football. Henceforth, the following unique tools are available free of charge:

Player profile comparator (big-5)

Transfer value trends (big-5)

Player performance rankings (big-5)

Club performance rankings (35 European leagues)

Digital Atlas (31 European top divisions)

The publication of the increasingly successful and influential Weekly Posts will start again after the summer break. The next Monthly Report will be published just after the end of the transfer window. It will analyse market trends from an economic standpoint. During the summer, exclusive information will be presented through our Twitter account and Facebook page.

To know more about corporate sponsorship opportunities, please contact us at football.observatory@cies.ch.

The 36th CIES Football Observatory Monthly Report analyses the composition of squads in five major women’s leagues: four European (Germany, Sweden, France and England), as well as the Women’s National Soccer League in the United States. The study highlights the increases in the average age of players. The number of expatriate footballers goes also up both on the pitch and in squads.

The economic development and professionalisation of the women’s game are leading to several processes already observed at men’s level. A convergence process notably exists in terms of players’ age. While on average still younger than their male counterparts, women playing in the leagues surveyed are getting older. Up until a certain level, this process will probably continue in the years to come.

A second important trend is the growth of the expatriate presence. While also still below the levels observed in the most competitive men’s leagues, the number of expatriate footballers in women’s clubs surveyed is on the increase. In this case too, a further growth is expected for the next years. The diversity of origins represented in the major championships should also go up.

Finally, as for the men’s game, without corrective measures, financial divides between clubs both at national and international level will increase. The economic development will indeed benefit some clubs and leagues much more than others. The high concentration of full internationals in some clubs (Wolfsburg, Lyon, Chelsea, Bayern Munich, etc.) already illustrates this process.

The last Weekly Post before the summer break ranks teams participating in the 2018 FIFA World Cup according to the transfer value of squad members, estimated from the CIES Football Observatory algorithm. At the top three positions of the table are France (€1.41 billion), England (€1.39 billion) and Brazil (€1.27 billion).

The valuations refer to the fair price that the most likely buyer clubs should pay to sign the players. The sporting performance of both the footballers themselves and their clubs of belonging are included in the algorithm. In addition, other variables such as age and contract duration are taken into account, as detailed in the following research note.

The estimated transfer value for all players participating in the World Cup is €12.6 billion. At the bottom of the table are three non-European countries with almost no players employed by clubs in the most competitive leagues: Panama, Saudi Arabia and Iran. The World Cup will probably allow some of them being spotted by teams in the richest football countries. The transfer values of all big-5 league players are available here.

Harry Kane has become the world most expensive player from a transfer value perspective according to the exclusive CIES Football Observatory algorithm. Following his new outstanding season, the Englishman is now worth €201.2 million. Tottenham’s striker outranks two Paris St-Germain’s players: Neymar (€197.5 m) and Kylian Mbappé (€186.5 m). The top 100 list for big-5 league footballers is available in issue number 230 of the Weekly Post.

In the top ten positions are players from six countries: England (Kane and Alli), Belgium (de Bruyne and Lukaku), Argentina (Messi and Dybala), France (Mbappé and Griezmann), Brazil (Neymar) and Egypt (Salah). With 16 players, France is the most represented country in the top 100. Cristiano Ronaldo (24th, €103.4 m) is the oldest footballer listed, while Gianluigi Donnarumma (73th, €67.5 m) is the youngest one.

The highest estimated values per position were recorded for Ederson Moraes (goalkeepers, €104.6 m), Samuel Umtiti (centre backs, €111.5 m), Kyle Walker (full backs, 89.8 m), Saúl Ñíguez (defensive midfielders, €100.5 m), Kevin de Bruyne (box-to-box midfielders, €167.2 m), Dele Alli (attacking midfielders, €171.0 m), Neymar (wingers, €197.5 m) and Harry Kane (centre forwards, €201.2 m). More information on the CIES Football Observatory algorithm is available here.

The five major European championships ended. Issue number 229 of the CIES Football Observatory Weekly Post compares the final rank for each team with its position in a virtual table elaborated on the basis of a production index. The latter takes into account three key performance indicators (data from InStat): shots conceded or attempted from the box, as well as the percentage of possession.

Three out of the five champions also were the most productive teams: Bayern Munich (+94% compared to the Bundesliga club average), Paris St-Germain (+84%) and Manchester City (+82%). In Spain, third-ranked Real Madrid (+61%) had a higher production index than Barcelona (+52%). In Italy, runners-up Napoli (+59%) outranked Juventus (+38%).

The most positive gaps per league between the position in real table and that in the pitch production ranking were measured for Burnley (+11), Villarreal (+7), Amiens (+7), Hertha Berlin (+6) and Chievo (+5). The most negative differences were recorded for Southampton (-10), Athletic Club (-11), Caien (-5), Hamburger (-6) and Benevento (-6). The analysis for more European leagues are published on Twitter through the CIES Football Observatory account.

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Issue number 228 of the CIES Football Observatory Weekly Post analysed InStat data to unveil teams having scored the most goals within ten seconds from free kicks per domestic league minute played this season. Fresh Swiss champions Young Boys scored a goal from these situations every 277 minutes. This is the best value measured for the 31 European competitions included in the study.

Girona (318 minutes) tops the big-5 league table ahead of Italian champions Juventus (354 minutes) and Schalke 04 (360 minutes). However, the most positive gap between goals scored (8) and conceded (1) from free kicks situations was recorded for Spanish champions Barcelona (+7). Tottenham and Stade Rennais (both +6) rank second. Only Arsenal and Werder Bremen did not concede goals within ten seconds from free kicks.

Heidenheim (322 minutes) heads the table for second division leagues of countries hosting the five major European championships. The German team outranks Oviedo (341 minutes) and Queens Park Rangers (346 minutes). Young Boys is ahead Xanthi and Göztepe for countries between the 6th and 15th position in the UEFA rankings, while Radni?ki Niš tops the table for less performing leagues.

Issue number 227 of the CIES Football Observatory Weekly Post ranks footballers having played at least 1,800 big-5 league minutes over the season (1,440 for Germany) according to their performance level. Lionel Messi heads the table ahead of David Silva and Paulo Dybala. Six Manchester City players are in the top 10 list.

Robert Lewandowski ranks the table for German Bundesliga players (10th overall), while Edinson Cavani heads the French Ligue 1 rankings (21th overall). Per position, the best-ranked footballers are Marc-André ter Stegen for goalkeepers, Nicolás Otamendi for defenders, David Silva for midfielders and Lionel Messi for forwards. The methodology used is available in this research note.

The English Premier League is the most represented competition in the top 100 positions (30 footballers), while Bayern Munich is the most represented club (11 players). In total, 26 teams have at least one squad member in the top 100 list. The youngest footballers are Kylian Mbappé, Houssem Aouar, Malcom Filipe, Tanguy Ndombélé, Davinson Sánchez and Leroy Sané.

The last CIES Football Observatory study analyses the presence of expatriate players in the world. With 1,236 representatives abroad, Brazil is at top the table (+42 compared to 2017). France (821, +45) overtook Argentina (760, -26) as the second biggest exporter. The top 50 list is available in the 35th edition of the Monthly Report.

Brazilians are present in a record number of 78 associations out of the 93 covered by the study. The international path with the most expatriates involved goes from Brazil to Portugal. On the 1st of May 2018, 240 players from Brazil were playing in Portugal at professional adult level. The main destination for the French is England (99 players), while that of the Argentineans is Chile (106).

If we take population into account, the highest rate of expatriates per million of inhabitants was recorded for Iceland (180). This figure is above 100 only for one other association: Montenegro (134). It is also very high for double world champions Uruguay (96) and Croatia (80). In total, expatriates account for 21.2% of squads. This is 1.2% more than on the 1st of May 2017.

The average transfer value of Manchester City’s first team squad members estimated by means of the exclusive CIES Football Observatory algorithm reached a record high of €62.9 million. This is the greatest value measured at big-5 league level ahead of Barcelona (€55.3m) and Tottenham (€51.3m). The figures for all big-5 league teams are available in issue number 226 of the Weekly Post.

English Premier League economic power, outstanding performance, long-term contract duration and youthfulness are the key criteria explaining Manchester City’s first position. Seven of their players have an estimated transfer value of more than €100 million: Kevin de Bruyne, Leroy Sané, Raheem Sterling, Gabriel Jesus, Ederson Moraes, Bernardo Silva and Sergio Agüero.

Among the 31 teams whose players have an average estimated transfer value greater than €10 million are nine clubs from the Premier League, eight from the Serie A, six from the Liga and four from both the Bundesliga and the Ligue 1. The lowest ranked Premier League team, West Bromwich Albion, is 55th out of 98. This also reflects the economic dominance of the English top division.

Issue number 225 of the CIES Football Observatory Weekly Post reveals the most likely World Cup winners according to an exclusive power index. This index combines the average percentage of matches played at domestic league level since July 2017 by the 23 most fielded players per team in the qualifying campaign with the average sporting level of employer clubs. Spain tops the list ahead of Brazil.

During current season, the 23 Spanish footballers most fielded in the qualification stage have on average played 81.1% of domestic league matches. This is the highest figure measured among all participating teams. The average sporting level of the clubs employing Spanish players is also the greatest overall: 1.37. According to these criteria, Spain is well placed to repeat its 2010 success. Three other teams have a power index of more than 80: Brazil, France and Germany.

At the opposite end of the table, the lowest power index was recorded for Panama. Two other nations have a score inferior to 25: Iran and Saudi Arabia. For all these countries, reaching the last 16 stage would be a great achievement. For more information about the features of players employed during the qualifications, please refer to the 30th edition of the CIES Football Observatory Monthly Report.

Issue number 224 of the CIES Football Observatory Weekly Post presents the best performing big-5 league players whose contract runs out at the end of the season. Pepe Reina ranks first ahead of two other goalkeepers (Vicente Guaita and Gianluigi Buffon), as well as Arjen Robben. Only footballers having played at least 1,000 domestic league minutes during the current season are included in the rankings.

For outfield players, the CIES Football Observatory performance index takes into account the production and efficiency in six different areas of the game: rigour, recovery, distribution, take on, chance creation and shooting. For goalkeepers, it includes the minutes per goal conceded, as well as the number and percentage of saves. Results achieved for matches played are also considered as a weighting factor.

In the top 50 list are many relatively young full international players such as Emre Can (Liverpool), Jack Wilshere (Arsenal), Leon Goretzka and Max Meyer (Schalke 04), Sanjin Prci? (Stade Rennais) and Stefan de Vrij (Lazio). As for Goretzka, who already signed for Bayern Munich, all these players will most probably be able to negotiate lucrative contracts in prestigious teams.

Gianluigi Buffon heads the table for the big-5 league players who have been for the longest period in their club employment. The legendary Italian goalkeeper already played for 17 seasons at Juventus. This is sixth months more than the second ranked footballer, Sergio Pellissier (Chievo), and one year more than for Andrés Iniesta (Barcelona) and Roman Weidenfeller (Borussia Dortmund). The top 110 list is available in issue number 223 of the CIES Football Observatory Weekly Post.

In total, 61 footballers played for at least ten seasons in their current club. Among them are many other legendary players such as Lionel Messi (14 seasons in Barcelona’s first team squad), Giorgio Chiellini (13, Juventus), Sergio Ramos (13, Real Madrid), Michael Carrick (12, Manchester United), Marcelo (11.5, Real Madrid), Franck Ribéry (11, Bayern Munich), Marek Hamšík (11, Napoli), Fernando Torres (10, Atlético Madrid) and Cristiano Ronaldo (9, Real Madrid).

In five clubs, the most loyal squad member only played there for four seasons: Fiorentina (Badelj), Crotone (Martella), Getafe (Guaita), Nice (Mendy, Pléa and Pouplin), as well as Caen (Vercoutre, Féret, da Silva and Bazile). The freshly published 34th edition of the CIES Football Observatory Monthly Report analyses the relationships between squad stability and success in 31 top division leagues of UEFA member associations.

The first CIES Football Observatory Monthly Report published in January 2015 studied club stability across Europe. Three years later, the thirty-fourth edition develops this issue by illustrating the value of long-term planning for football clubs. The indicator selected is the percentage of players recruited by their employer club since less than one year.

The study reveals that the best performing teams have much more stable squads than lesser competitive ones. Between 2009 and 2017, big-5 league champions had on average only about one in four new players as squad members. This proportion can be considered as an optimal balance to achieve success.

The Report also highlights the increasing instability of teams across Europe. On the 1st of October 2017, 44.9% of players were recruited during the year. This figure was only 36.7% in 2009. If this trend continues, footballers who have been with their employer club for more than one year will soon represent less than half of squad members.

To limit the growing instability, football’s governing bodies should act against the increasing financial gaps between teams both nationally and internationally. They should also combat corrupt practices at both transfer market and club management levels. It is also necessary to limit the speculation around players’ mobility, notably through a greater protection of training clubs, the enforcement of the third-party ownership ban and the reinforcement of the regulations regarding football intermediaries.

Visit the exclusive CIES Football Observatory Digital Atlas to know more about the demographic features of teams in 31 top division leagues of UEFA member associations.