The game sees some fascinating individual battles with French worldwide midfielders N'golo Kante and Paul Pogba on opposite sides, while Chelsea goalkeeper Kepa Arrizabalaga and his Manchester United counterpart are now second and first choice in the Spanish national team.
However, Ianni continued to celebrate in a demonstrative manner and ran past the United dugout, with the visitors' coaching staff and players stunned by his actions.
Jose Mourinho said yesterday that he would not gloat if Manchester United beat Chelsea away today because he has too much respect for his former club. "I want to play with the short passes".
Pat Nevin believes Chelsea FC's clash against Manchester United on Saturday afternoon could prove to be more hard than their recent 1-1 draw with Liverpool FC earlier in October.
"And after that Sarri's assistant came to me and apologised to me".
Mourinho reacted furiously, chasing Ianni done the tunnel and ultimately had to be retrained by stewards. I think that I have to respect him, and I think you [the media] all have to respect him.
It would have been United's second straight victory from behind following the 3-2 win over Newcastle a fortnight ago, and Mourinho says his side were the best on the pitch. "I'm not going to kill you because of [just] one'".
Mourinho revealed after the match that he had accepted apologies from Sarri and Ianni once tempers had cooled, and the Chelsea head coach said he knew immediately that his assistant needed to make things right. The result is really unfair for us. He and Chelsea manager Maurizio Sarri had made amends with a handshake.
Manchester United and Chelsea face off at the Stamford Bridge on Saturday in the standout clash of the Premier League's ninth weekend.
Mourinho, who had two spells in charge of the London club and led them to three league titles, has not enjoyed previous meetings with Chelsea as United boss, losing four out of six matches including this year's FA Cup final.
United's first-half performance was so poor that they could not have complained had they gone in two or three goals down.
However, when Shaw cut out a risky low cross from the Belgian on 21 minutes, the visitors were undone by a lack of concentration from Paul Pogba.