Jose Mourinho has behaved “like a big baby” and Manchester United will only improve under a different manager, says Premier League winner Chris Sutton.
Mourinho’s United lost 3-1 to derby rivals Manchester City on Sunday, leaving them eighth in the table.
After the match, he said City had benefited from playing two “friendly” matches beforehand, while United were “fatigued” after beating Juventus.
Sutton said those comments were “disrespectful” and “utter rubbish”.
City beat Southampton 6-1 in the league and Shakhtar Donetsk 6-0 in the Champions League before playing United, who defeated Bournemouth 2-1 and beat Juve by the same scoreline.
Speaking on BBC Radio 5 live’s Monday Night Club, former Blackburn and Celtic striker Sutton added:
United were outclassed. It was like watching Manchester versus Manchester reserves.
“There is an enormous gap between them and City, and things aren’t going to change unless they change the manager.
“What was most galling for me were Mourinho’s comments after the game – kicking off, behaving like a big baby. When is it going to stop?”