I’m thinking there may be more failures than successes though ??
Of course there are inherent risks which any transfer as it is not just a case of swapping shirts but of adapting to a new culture and country
Since 1999 -
Real Madrid:
MacManaman (Success)
Anelka (Fail)
Beckham (Mixed)
Woodgate (Mixed)
Gravesen (Fail)
Ruud van Nistelrooy (Success)
Robben (Success)
Heinze (Success)
Dudek (Mixed)
Lass Diarra (Success)
Arbeloa (Sucess)
Xabi Alonso (Success)
Ronaldo (Success)
Carvalho (Success)
Modric (Success)
Bale (Success) - I am marking as success because they did win 4 CLs with him and had chances to recover his fee at points)
Courtois (too early)
Brahim Diaz (too early)
Potentially: Hazard, Pogba, Eriksen
Barca:
Overmars (fail)
Petit (fail) - all his fault, though?
Gio (Success)
Gudjohnsen (mixed)
Henry (Success imo)
Pique (Success)
Hleb (FAIL)
Mascherano (Success)
Cesc (Success) - I am marking as success because we did 1 league with him and we recovered his fee
Song (lol)
Suarez (Success)
Verm (Mixed)
Coutinho (too early/mixed/fail)