3. Alvaro Morata
Morata was sold by Los Blancos last July, putting pen-to-paper on a five-year deal with Juventus, but the decision to sell may have been rash by the La Liga BBVA giants.
At 22-years-old, the Spaniard still has his peak days ahead of him, and his performance against his former club in the Champions League last season illustrated a player finally blossoming into a top striker.
According to reports, a buy-back option was written into the agreement on his sale to Juve, but they will have to wait until the end of the 2015-16 season to activate this clause.