5. Zlatan Ibrahimovic and Oguchi Onyewu
First revealed in the Swede’s autobiography earlier this year, he claims that the big American took an instant dislike to him and the pair came to blows on the training ground. The brawl began following a sharp two-footed tackle from Ibrahimovic, Onyewu reacted and they had to be separated as Zlatan aimed a headbutt his way, but still came away with a broken rib.