United could fall 15 points behind Premier League leaders Manchester City if their rivals win at Newcastle on Wednesday following a 2-2 draw with Burnley at Old Trafford.
Police officers and stewards had to separate up to 20 players and members of staff from Manchester United and City after an extraordinary bust-up in which bottles and punches were thrown and Mikel Arteta, one of Pep Guardiola’s assistants, was left with blood streaming down his face.
Pep Guardiola's celebrations with his backroom team when the final whistle sounded on Manchester City's outstanding win at Chelsea underlined the significance of what he had just witnessed.
The shirts will be auctioned off after the game and proceeds will go to the We Love Manchester Emergency Fund.
The charity has raised more than £12m for the victims of the explosion on 22 May, which killed 22.