Idrissa Gueye

Idrissa Gueye has been a revelation at Everton this season.

Signed in a relatively low-profile deal over the summer, Gueye has outshone any other signing in the Premier League – and he has been crucial for Koeman.

Everton lost to Chelsea at the weekend and looked poor without Gueye – and that proved just how important he is to this side.