NEW footage of the Chelsea staff member's celebration that riled Jose Mourinho at Stamford Bridge on Saturday has emerged.
The Manchester United boss had to be held back after Blues assistant coach Marco Ianni celebrated Ross Barkley's injury-time equaliser in his face.
Match of the Day aired footage which showed Ianni celebrate not once but TWICE in front of Mourinho.
Talking to Sky Sports after the thrilling 2-2 draw, Mourinho explained what happened between them after the final whistle.
As we reveal exactly what happened to wind Mourinho up, the Portuguese said: "What happened was with [Maurizio] Sarri's assistant and Sarri was first to come to me and say he would resolve the problem internally with him.
"His assistant came to me in Sarri's office and apologised to me.
"I said if you really feel that way I accept your apology and forget it, because I also made lots of mistakes in my career. I'm not going to kill you because of one.
"He apologised and I accepted it."
Antonio Rudiger put Chelsea ahead before two Anthony Martial strikes had United on the brink of three points at the Bridge.
But Barkley pounced in the 96th minute, with Ianni running in front of Mourinho while Sarri jumped around celebrating.
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Mourinho also said the result was "awful" for his side.
He said: "We were the best team on the pitch. If you say before the match one point at Stamford Bridge, it is always a good result.
"But after the game, the way the game was, it was an awful result for us and a phenomenal result for them."