Civil war at Eastlands
Mark Hughes had countless troubles with the enigmatic Brazilian, including seeing him leave a Tenerife training camp without permission in January last year.
Fell out with Roberto Mancini just two months after the Italian took over from Hughes, reportedly over the manager's approach to training.
Clashed with Mancini at half-time during the 2-1 win over Newcastle; has also made clear several times that he is unimpressed with the training regime.
Confronted two team-mates after 3-0 defeat at Spurs last year; Gareth Barry admitted players were "at each other's throats" in the dressing-room after the game. (© Daily Telegraph, London)