Manchester United manager Erik Ten Hag thanked Pep Guardiola and Manchester City for the reality check dished out in Sunday’s derby demolition.

The Old Trafford giants are in the midst of their latest post-Sir Alex Ferguson rebuild after a wretched campaign that saw Ole Gunnar Solskjaer sacked and interim replacement Ralf Rangnick flounder.

United’s poor season means they are currently preparing for Europa League action rather than Champions League football, with the side jetting off to Cyprus to face Omonia Nicosia reeling from a humiliating 6-3 derby defeat.

Erling Haaland and Phil Foden both scored hat-tricks in a hammering that showed the chasm between Ten Hag’s side and back-to-back Premier League champions City.

“Obviously it was a difficult day,” Ten Hag said. “As always we analyse and we do that tough, the reality.

“It was a reality check, so we have to learn from it and carry on.

“You always take respect of the opponent but we will still stick to our philosophy, our rules, our principles.

“In tactics sometimes, also to surprise opponents, you have to bring something different in your game, and we will do that also for the future.

“But we can get a lot of confidence about this theory, when you beat Arsenal, you beat Liverpool and now we get a reality check with Man City – so we know we have to step up.

“So thank you for the lesson, from Pep and City. We will take that and we have to understand we have to do things much better.”

Erik Ten Hag (centre) reacts after the Manchester City defeat
Erik Ten Hag’s (centre) side face Omonia Nicosia reeling from a humiliating 6-3 derby defeat (Martin Rickett/PA)

Ten Hag always knew there would be setbacks along with positive results but said Sunday’s performance was “unacceptable”.

Bruno Fernandes said they had a meeting to go through “the tough things, the mistakes that we did”, with the stand-in skipper determined to get back on track after that chastening loss.

“Obviously we know the game we played was not good enough for our standards, for what we have set for ourselves, for what we want to achieve this season,” the United attacking midfielder said.

“We have let down the club altogether, not just one or two players. Altogether we didn’t do enough to win the game, to get points from that game.

Harry Maguire in action for Manchester United
Skipper Harry Maguire misses the trip to Cyprus (Martin Rickett/PA)

“We all – when I say all I mean all, starting with me – are disappointed with the result obviously.

“Even on the derby, we have to take that for seeing what margin we still have to improve. It’s still a long way to go.

“We know what we want to achieve, we know what we want to do.

“I know what the manager wants from me. I think we all know what the manager wants for us as a team and I think now it’s just the time to get back to the good results. We have the chance to do it tomorrow straightaway.”

United are taking a 22-man squad to Cyprus – a trip skipper Harry Maguire, Raphael Varane, Aaron Wan-Bissaka and Donny Van De Beek will miss.

“They’re not available for tomorrow,” Ten Hag said.

“In the case of Rapha, I have good hope (he will be available soon). Harry will take a little bit longer and the other two I cannot give a prognosis.”