Inter Milan striker Romelu Lukaku was involved in a heated exchange with his teammate Nicolo Barella.
The two were butting heads during Inter's 0-0 draw against Sampdoria on Monday.
Lukaku was gesturing to Barella to stop flapping his arms around constantly.
He is said to have shouted, per the Daily Mail: Don't do that, enough with these arms! Do not do that! It's not good, it's insulting, now stop!"
Barella unleashed a response, which Lukaku did not appreciate, leading to him saying: F*** you, son of a b***h" to Barella.
Post-game, coach Simeone Inzaghi stated: These things happen on the pitch, they shouldn't happen and I don't like to see them."