Manchester City teammates had to intervene as Mario Balotelli and Yaya Toure clashed at halftime of their defeat to Swansea City.
The Daily Star says Balotelli and Toure had to be dragged apart in the tunnel at half-time after shouting insults at each other.
While City were fighting, and losing to Luke Moore's late goal, neighbours Manchester United took full advantage with victory over West Bromwich Albion.