"El Hadji has always been the kind of player opposition teams and supporters hate," explained Roy Keane upon signing the Senegalese forward, "That's why we're delighted to now have him in our squad." Intended to bolster Sunderland for their second season back in the Premier League, El Hadji Diouf did entirely the opposite. He failed to deliver on the pitch, scoring no goals, but the real problem lay elsewhere. Diouf's notorious attitude problem showed no signs of changing, and he was rumoured to be the source of major divide within the dressing room, the most notorious incident a reported bust-up with centre back Anton Ferdinand. The pair's hatred for one another remained even after leaving Wearside, both cautioned by police after a nightclub incident in 2012.