9) Neymar (Barcelona)
A young talent with his best years ahead of him, Barcelona forward Neymar has already moved for big money and could well be the next player to cost a world-record transfer fee.
10) Cristiano Ronaldo (Real Madrid)
He’s already been the most expensive player in the world at £80m, and Cristiano Ronaldo is still likely to cost big money if he ever moves, with PSG rumoured to be weighing up a £100m bid.