Six Real Madrid stars Manchester United should chase instead of ageing, expensive Cristiano Ronaldo

4) Raphael Varane

United have looked shaky at the back in recent times, and what better way to solve the problem than to sign one of the best centre-back prospects in the game. With Pepe and Ramos seemingly ahead of the 22-year-old in the pecking order at the Bernabeu, he could surely be tempted by a move.