For any football fan: A and B are two footballers who played for Club X sometime after?

... 2000.

Both then left. A went to Club Y and won the league and B went to Club Z and won the league (Y and Z) are rival clubs.

A and B then reunited at Club W before A returned to play for X.

A and B have both won the champions league.

Name A,B,W,X,Y,Z