FC BARCELONA - AC MILAN MUCH MORE IN COMMON

What have all these Football Players in common?
Bojan Krkic. 
Ronaldinho. 
Patrick Kluivert. 
Winston Bogarde. 
Michael Reiziger. 
Ronaldo. 
Rivaldo. 
Ibrahimovic.
Other names
Dugarry, Van Bommel, Maxi López, Zambrotta, Davids & Albertini 




As Spanish Sports paper "Marca" points out today, all are have had played ( Bojan currently playing ) at FC Barcelona & AC Milan. Both Clubs have obviously