8) William Gallas & Kolo Toure (Arsenal)
Defensive partners at the back for Arsenal for a number of years, it soon emerged that Kolo Toure and William Gallas did not get along at all, with Toure eventually feeling he had to leave the club for Manchester City to get away from the Frenchman, who was known for being a difficult personality. It is thought that the issues may have started when Arsene Wenger chose Gallas over Toure for Arsenal captain.