Manchester United boss Erik ten Hag says Marcus Rashford's birthday party on Sunday night was "unacceptable".

Rashford celebrated his birthday just hours after United were thumped at home by Manchester City.

"I am aware of it and I spoke with him about it," said Ten Hag. "It is unacceptable. I told him. He apologised and that is it."

Ten Hag refused to confirm whether Rashford had been fined for his behaviour.

It was put to Ten Hag that Rashford's form has fallen away after he won a new contract.

"Your suggestion is not right," he said. "He's very motivated to put things right. He's totally with us.

"So he makes a mistake, but that doesn't say he's not fitting in. I see him every day in training, what he's doing. I know. Also off the pitch, how he lives."

On his form, Ten Hag said: "He has to be as close as possible to the opponents' goal because that's where his qualities are.

"There, he is so important for us and will contribute so much to our success and so we have to get him there, as a team and an individual.

"Also he has to get his timings and movements right to arrive [in front of goal] in the right moments. I'm sure he will be back."