5. Raphael Varane
Tipped to become one of the greats of world football, it would take an ambitious bid for Manchester United to tempt Varane away from Real Madrid. The French defender has earned huge amounts of praise since arriving at Real Madrid from Lens in 2011 for his abilities as modern day centreback. Full of pace and aerial presence, he is the ideal defender for any Champions League manager to have. Also, at 20-year-old he still has plenty of potential to fulfill.