Mourinho took exception to the celebrations of one of Sarri's backroom staff, Marco Ianni, who ran in front of the Portuguese on the touchline, as he seemed set for a sweet victory over his old club after Anthony Martial scored twice to cancel out Antonio Rudiger's opener.
A member of Chelsea's coaching staff celebrated wildly in front of the United bench and clearly angered Mourinho, who leapt to his feet and was soon in the middle of a melee that included security staff and, before long, players from both sides.
"I am not annoyed with anything", the United boss told Sky Sports.
I think it's fair to say that the football world had quite the mixed reaction to the game... Sarri came to me, and said he would resolve it internally. Then the young fellow came and apologised and I told him I accepted.
"I said "if you really feel that way and want to apologise I'll accept it, because I've made mistakes in my time too".
He later held up three fingers to the Chelsea crowd, signifying the three Premier League titles he won with the Blues.
President Trump Just Moved His Rally in Texas...to a Bigger Venue
Beto O'Rourke (D-Texas) addressed rumors that he might be eyeing a presidential run in 2020, saying, "It's a definitive no". In a Thursday town hall discussion on CNN , the Senate hopeful explained that he called his challenger, Sen.
"Maybe player by player they are the best team in the Premier League", Sarri said.
Former Arsenal midfielder Merson believes Chelsea FC will inflict a fourth league defeat of the season upon Mourinho and his Manchester United side to leave their rivals toiling in mid-table.
"At the moment I think City is better like a team, but player by player they (United) are very, very strong". The 2-2 [equaliser] in last minutes is okay for confidence of my players, but I have to look at something else.
His second was an even sweeter finish that showed what United are capable of with Juan Mata and Marcus Rashford also playing their part in a flowing move.
The match was overshadowed by an incident in the closing stages, with Mourinho reacting badly after being goaded by Chelsea coach Marco Ianni.
Mourinho has been charged by the English Football Association for abusive language after a 3-2 win over Newcastle United this month, a match which Manchester United had been losing, adding to speculation that his job was on the line.