World’s 20 Most Valuable Players Released By Think Tank: Chelsea Ace 4th & Arsenal’s Ozil 8th

14) Isco – Real Madrid – Price range: £33.0m – £38.3m

Isco signed for Real for huge money last summer, but actually struggles to get into the side because of Bale and Ronaldo.

13) Sergio Aguero – Manchester City – Price range: £36.5m – £42.4m

City could be bracing themselves for a mega bid from Barcelona for the Argentine ace this summer.