AFP, MANCHESTER: Manchester United manager Jose Mourinho became involved in a physical confrontation with Manchester City's players after complaining about their post-derby celebrations, according to British media reports late on Sunday.

The Daily Mail and Daily Telegraph said Mourinho went to City's changing room following United's 2-1 defeat at Old Trafford because he felt their noisy celebrations were disrespectful.

The newspapers reported Mourinho had a verbal altercation with City goalkeeper Ederson before having water and milk thrown at him by City's players and being hit on the head with a plastic bottle.

The Mail said United's security had to break up a brawl involving 20 players and staff members from both clubs, which was said to have occurred near the Old Trafford tunnel.