4: Paul Pogba
For Manchester United fans Paul Pogba has very much become the one that got away.
The French starlet has gone from strength to strength in 2013 and is now a highly sought after commodity wanted by a number of elite clubs.
If Juventus can keep hold of him he'll no doubt continue to improve, but if he moves to the likes of Chelsea or Arsenal we could be treated to a very entertaining spectacle.
Capable of frequent wonder strikes, individual genius and a showman if ever there was one, Pogba's development should be watched with interest by all.