Quiz: Can you name the 10 most expensive defenders of all time?

You've got two minutes.

Really, all you have to do is name nine players because you'll probably have heard that Kyle Walker has become the joint most expensive player of all time. Yep. We can't believe it either. The former Tottenham man has joined Manchester City for an appalling £50m but who are the other players who make up the list of the game's 10 most expensive defenders? Off you go...