The CIES Football Observatory celebrates the 250th edition of its Weekly Post with an exclusive analysis on the contribution of clubs in training the players fielded in big-5 league matches during the last five years. Training clubs are those where players have been for at least three seasons between the ages of 15 and 21. The rankings are elaborated by summing minutes played in the big-5 since January 1st 2014 by all of the footballers trained per club.

Barcelona tops the table with 69 footballers trained fielded in the big-5 by 55 different teams for a total of 319,224 minutes. Behind the Catalans are their great rivals Real Madrid: 69 footballers trained, 44 different clubs, 304,052 minutes. In the top ten positions are six Spanish, three French and one English team (Manchester United). According to the definition used, Cristiano Ronaldo and Paul Pogba are Manchester United club-trained players.

The best-ranked clubs for the remaining big-5 leagues are Olympique Lyonnais, VfB Stuttgart and AS Roma. The greatest contributors outside of the countries hosting the five major European competitions are River Plate, Sporting Clube, Boca Juniors, Ajax and Feyenoord. In total, 1,370 teams have trained players fielded in the big-5 during the last five years. More information is available on request at football.observatory@cies.ch.