Lautaro Martinez and Antonio Conte had a heated argument on the touchline after the Inter coach replaced the forward in the 77th minute of the Nerazzurri's 3-1 win against Roma on Wednesday night.
The Argentine came off the bench in the 35th minute to replace Alexis Sanchez, but Conte decided to bring him off in the second half.
Conte's decision frustrated Lautaro, who angrily stared at his coach while heading to the bench, where the kicked a bottle which was on the floor.
"Show some respect and don't pretend to be a superstar," Conte said to Lautaro after seeing his player's reaction.
Inter had already secured their first Serie A title since 2010 before their match against Roma, and they are currently 13 points ahead of second-placed Atalanta.