3. Cesc Fabregas – Barcelona (to Chelsea)
Fabregas was clearly undervalued at Barcelona.
In just eight games for Chelsea, he has proved that he is truly world class, scoring one goal and provided seven assists.
Barcelona may not be missing him yet, but Fabregas is one of the few players on the planet who are capable of replacing Xavi.
When Xavi, who is now 34, finally leaves the first-team squad, Barca will surely rue getting rid of the former Arsenal skipper.