Alexis Sanchez was reportedly responsible for breaking up a heated dressing room row between teammates Romelu Lukaku and Marcelo Brozovic during Inter Milan's 1-1 draw with Slavia Prague in the Champions League.
Lukaku is said to have been disappointed with Inter's performance and called out Brozovic at half time, berating the Croat for giving possession away too easily.
In response, Brozovic hit out at the striker by accusing him of missing an easy chance to put Inter ahead.
According to Gazzetta, the feud threatened to escalate before Sanchez stepped in to break up the row between the two players.
Manager Antonio Conte is said to be fuming with the situation and has advised club chief Giuseppe Marotta to deal with the matter properly behind closed doors.
Lukaku left Manchester United to join Inter for a club-record £72m last month, while Sanchez also moved to San Siro on a season-long loan.