Erik ten Hag forced his Manchester United flops to listen to Manchester City’s celebrationsCredit: Getty

Erling Haaland scored twice in the 3-0 win at Old TraffordCredit: Getty

And when the players got back to their Old Trafford dressing room on Sunday, he ordered them to sit and listen to Manchester City’s stars across the other side of the tunnel celebrating.

He also wanted them to hear away fans still hailing their heroes after totally outclassing United.

Ten Hag then tore into his troops for their second-half performance.

The Dutchman had planned to give his players a bonus day off yesterday if they had beaten the Premier League champions.

That was obviously cancelled, with the squad hauled in for a further post-mortem into how they were humbled.

And the struggling Red Devils players have now been told there will also be extra ‘homework’ with personalised videos showing where they went wrong.

It was United’s fifth defeat in their opening ten Premier League games and leaves them down in eighth — 11 points behind early pacesetters Tottenham.

That is their worst start to a season since 1986-87 when Ron Atkinson was sacked on November 6.

There is no suggestion former Ajax manager Ten Hag’s position is under threat but there is concern at the club over performances.

Sky Sports pundit and Old Trafford legend Gary Neville described Sunday’s second-half showing as “appalling”.

Ten Hag ended the club’s six-year trophy drought in his debut season with Carabao Cup glory.

He also led United to the FA Cup final and finished third in the Prem to earn a Champions League place.

The reigning Premier League champions were a class apart and had plenty to cheerCredit: Getty

Haaland headed in the second after his first-half penaltyCredit: Alamy

It was another miserable afternoon for the Red DevilsCredit: Richard Pelham / The Sun