Hat-tricks from Erling Haaland and Phil Foden saw the reigning Premier League champions, who led 4-0 at the break, cruise to victory at the Etihad Stadium on Sunday afternoon and findh 6-3 overall in the match.
Manchester United came into the match with 4 consecutive premier league victories but Erik Ten hag's side was battered by pep Guardiola's team which most of the time looked like a match between men and boys.
Former Manchester United captain Roy Keane was left unimpressed by the way his former club approached the game. Keane told Sky Sports: "Man City were magnificent. Watching Man City, it is a pleasure. Watching them live, they are one of the best teams I've ever seen.”
"But Man United, [it's] a huge setback for them. We were giving them a little bit of praise over the last few weeks, but this is a huge step back.
"Four-nil down at half-time - they were 4-0 down at Brentford - and the performance in the second half, it's no good, even as consolation. They scored a few goals - the game's over.
"There's nothing for Man United to take out of this game. From the players' point of view, they really should be embarrassed. You can't go in at half-time 4-0 down in a derby game, it's hugely embarrassing.
"Haaland and Foden were brilliant, but if they're getting the service from people like De Bruyne and you're giving him time and space, you're looking for trouble, and they got punished and rightly so.“
Manchester United manager Erik Ten Hag after the match said: “It’s a lack of belief. When you don’t believe on the pitch then you can’t win games: that is unacceptable. The plan was to show bravery and confidence but we didn’t from the first minute. We left Haaland and we were not tight. For the first goal we won the ball and could have created a great chance but instead we gave it easily away and then it was like a pack of cards.”
“We get undisciplined at following rules and you get hammered. For me it was a surprise. We were not on the front foot, we were not brave on the ball and there were spaces to play but we were not brave enough.”