AC Milan president Silvio Berlusconi stands by Kevin-Prince Boateng's walking off of the field against Pro Patria.
Boateng led his teammates off the field in a friendly match on Thursday against Pro Patria after he was jeered by a section of the home support.
"I can assure you that if a similar situation occurs again in the future then Milan will walk off the pitch in all matches - even international ones," Berlusconi said.
"I spoke to Boateng a little earlier and I congratulated him for his reaction to this deplorable episode of racism at Pro Patria's stadium in Busto Arsizio.
"I really liked the behaviour of my Milan on this occasion and of the subsequent statements made by the players, the Coach and my daughter Barbara.
"These uncivilized episodes, these jeers and these denigrating chants are heard too often and offend football and the whole of sport.
"These heinous acts cause suffering to not only the athletes, but to clubs and the vast majority of fans."