Since 2009, the CIES Football Observatory has monitored the evolution of the demographics of players in 31 European top division leagues. The 2017 census reveals the intensification of the key trends observed throughout the period analysed: decrease of club-trained players, increase of expatriates and growing squad instability. The Monthly Report number 29 presents the data for all leagues studied.

Henceforth, club-trained players only account for 18.5% of squads (-4.7% since 2009). It is the lowest figure ever recorded. Conversely, the percentage of expatriates reached a new record high: 39.7% (+5.0% since 2009). A new record high was also observed with regard to the percentage of players signed during the year: 44.8% (+8.1% since 2009).

These trends reflect the increasing speculation on transfer operations and, more generally, in the management of professional teams across Europe. The central question is to know just how far this process can go without jeopardising the interest of competitions, the credibility of professional football and its sustainable development in the majority of countries.

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Issue number 201 of the CIES Football Observatory Weekly Post presents the lists of the 50 clubs from 36 European leagues who fielded the tallest and shortest line-ups since the start of the season. At the head of the rankings are FC København (186.2cm) and Ludogorets Razgrad (177.0cm). But does height explain success at adult level?

No correlation exists between the average height of teams and results achieved. The gaps observed rather reflect different approaches to the game. While some coaches prefer tall players, other give priority to shorter ones. However, very short players will struggle to establish themselves as professionals. The average height of all footballers in the leagues surveyed is 182.1 cm.

In total, only 67 clubs out of 572 (11.7%) fielded players on average shorter than 180cm. Among them, we notably find Manchester City (Guardiola), OGC Nice (Favre), FC Barcelona (Valverde), Olympique Lyonnais (Génésio) and Real Madrid (Zidane). The data for all teams in 31 top division European leagues is available in the CIES Football Observatory Digital Atlas.

The CIES Football Observatory has further developed its website with the inclusion of a brand new player performance widget. Using data provided by OptaPro, this unique tool allows users to compare the technical profile of players from the five major European leagues.

The comparison takes into account the performance of players in six areas of the game: rigour, recovery, distribution, take on, chance creation and shooting. The CIES Football Index measures the general performance of footballers over the last 1,000 domestic league minutes played. More information on the exclusive CIES Football Observatory approach is available in this research note.

This new and exciting tool is an ideal complement to the transfer value trend widget launched last month. The CIES Football Observatory research team is happy to stay at your disposal for any request at football.observatory@cies.ch.

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Issue number 200 of the increasingly popular CIES Football Observatory Weekly Post highlights the clubs having trained the most footballers present on the 1st of October 2017 in 31 top division European leagues. At the top of the table is Ajax Amsterdam, while Real Madrid trained the most big-5 league players.

Following UEFA’s definition, training clubs are teams where players stayed for at least three years between the ages of 15 and 21. AFC Ajax trained 71 footballers currently active in the 31 European championships surveyed. This figure was 72 on the 1st of October 2016. The Dutch team outranks Dinamo Zagreb (67) and Partizan Belgrad (61).

As for 2016, Real Madrid tops the table for big-5 league players. Eight of the 41 footballers trained by the Spanish side still play at Real Madrid. The second and third teams having trained the most players currently active in the five major European championships are Barcelona (34) and Olympique Lyonnais (31).

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The ability of teams to shoot is a key success factor. This holds even more true with regard to shots on target. Using the exclusive data produced by InStat, issue number 199 of the CIES Football Observatory Weekly Post presents the 100 clubs from the main top division European leagues presenting the highest figures for shots on target per match during the current season.

No team in the competitions surveyed achieved as many shots on target per domestic league game as SSC Napoli: 8.9. The Italian top-ranked team outranks Ajax (8.5) and their opponents in tonight Champions League game Manchester City (8.0).

The number of shots on target correlates inversely with the average distance of shots attempted. The best performing teams not only attempt more shots overall, but shoot on average from a closer range than less competitive sides. Consequently, the percentage of their shots that reach the target is generally higher.

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Issue number 198 of the CIES Football Observatory Weekly Post ranks top division teams from 31 European associations according to the percentage of domestic league minutes played by expatriates since the start of the season. Three Cypriot clubs are at the top of this ranking: Apollon Limassol (99.8%), Anorthosis Famagusta (95.3%) et AEK Larnaca (91.5%). Chelsea is ranked first at the big-5 league level (90.4%).

Expatriates are players who grew up in a different association from that of their employer club and who went abroad for football-related reasons. Only three teams out of the 466 included in the analysis did not yet field expatriate footballers in domestic league games this season: Oleksandriya (UKR), Veres (UKR) and HIFK (FIN).

In total, expatriates played 41.6% of minutes available. At league level, this figure varies from 80.2% in the Cypriot top division to 15.0% in Serbia. The data for all leagues and clubs surveyed is available for free in the exclusive CIES Football Observatory Digital Atlas.