Club legend Roy Keane told Manchester United they must “take their medicine" this season.
The Red Devils were beaten 3-1 by Manchester City away from home in the Premier League.
Despite leading 1-0 at half time, United had virtually no chances all game and were defending for large portions of the contest.
“I don't want to be too hard on United because City were brilliant. They showed why they're champions," Keane told Sky Sports.
“What City do is they find out all your shortcomings. There's no hiding place. It's like a boxing ring. They wore them down.
“The stats show you how dominant Man City were. [Erling] Haaland and [Kevin] De Bruyne weren't at their best but then Foden steps up.
“I think it's more credit to Man City than being too critical of Man United."