Sadio Mane punched Leroy Sane following a heated exchange in the dressing room.
The displeasure of both attackers was evident in the stadium where Man City thrashed them 3-0.
The altercation began in the 83rd minute when Sane reacted strongly to Mane's run across defence because he wanted to play short.
Later, the disagreement turned physical, and Sane's lips began to bleed while the other team members attempted to intervene.
Mane has received criticism for this, and the team management will take action against him like a penalty, a pay cut, etc.
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