The manager sat down with reporters and was asked about the game, his team selections, the penalty decision that led to City's opening goal and why he took Rasmus Hojlund off in the second half.
Here's the transcript of his answers in full...
Is that one of the most disappointing days you’ve had as Manchester United manager?
"Of course, it’s disappointing. Last year, we had many highlights but so far, not now, and when you lose the derby and the way you lose, it’s disappointing. In the first half, we had a very good game-plan and the execution of the game-plan was also good.