The summer transfer window closed three months ago, but who have been the most successful signings?
Of course, it's still very early days, but many of the big-money moves have worked out rather well - both for the player and club in question.
The players on this list have been ranked both on their contribution so far - as well as their potential contribution over the forthcoming months and years.
Disagree with the order or any of the selections? Comment below and tell us why.