Jose Mourinho lost his temper after a last-second equalizer goal and tried to get up-close and personal with the Chelsea coach celebrating the goal.
And he was showing great restraint, with Chelsea fans hounding him in the same way that had happened on his three previous visits back to his former club as the Manchester United manager, serenading him with chants of "F*** off Mourinho".
Despite accepting the apology, Mourinho did reveal his feelings towards the Chelsea fans following the incident, believing he was not respected by those who once used to sing his name.
"I'm not annoyed with anything", said Mourinho. I want to do well for my team, players and support.
It was after the final whistle that Mourinho was goaded by the Stamford Bridge faithful and he reacted by holding up three fingers, denoting the three Premier League titles he won as Blues boss.
United will be understandably disappointed to have seen two points slip through their grasp in dramatic fashion during their latest visit to the capital, but they had battled back from a goal down to lead through two Anthony Martial efforts.More news: Apple sends invites to October 30 event, new iPad Pros expected
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"He was very impolite but Sarri took care of the situation". 'However, we worked hard and this sort of match enabled us to show that we are a good team.
"What I can do is tell them what I keep telling them: it is my problem, to cope with it, because I am the man and let them enjoy their football the way they did against Newcastle in the second half". I want to play with short passes.
In contrast, Sarri - a relatively late bloomer in elite management after working his way up through the lower tiers of Italian football - is still waiting for his first piece of major silverware, and he believes he has a long way to go to be considered in the same bracket as Mourinho.
Sarri, who is yet to win a trophy in his management career, said: "The results speak for him".
"We defend mixed, so some of the players are in zone, some have individual opponents". I thnik we were on the wrong side [of the fight]. The 2-2 [equaliser] in last minutes is okay for confidence of my players, but I have to look at something else.
"But I have spoken to Jose, then a couple of members of our staff".
In the first half, United were the team so many have criticised this season. "Normally when I'm losing I never have five or six or seven minutes".