Jose Mourinho and Jurgen Klopp were involved in a furious bust-up on Sunday after the Liverpool manager accused his rival of trying to get Roberto Firmino sent off at Old Trafford.
The clash came towards the end of a 1-1 draw between Manchester United and their old enemy when Ander Herrera pulled Firmino back by the shirt and went down clutching his face as the Brazil forward lashed out.
Fourth official Craig Pawson had to separate Mourinho and Klopp as they confronted each other on the touchline, with the German angrily rejecting the offer of a handshake.