The Cameroonian's clanger undid an excellent start by the Red Devils and sent the hosts on the path to their 4-3 victory

Manchester United put so much faith in Andre Onana this summer, and their reward was a catastrophic error which paved the way towards a 4-3 defeat to Bayern Munich on Wednesday which puts yet more pressure on Erik ten Hag.

The Red Devils made a surprisingly good start and could have taken the lead, but Onana's feeble attempt to keep out a soft Leroy Sane shot put them on the backfoot, and Bayern twisted the knife in with goals from Serge Gnabry, Harry Kane and teenager Mathys Tel.

United can console themselves with the fact Rasmus Hojlund struck his first goal for the club and they at least put up a fight with Casemiro's two late goals, but this was another dark night for Ten Hag. His next game at Burnley is now a must-win match.

GOAL rates Manchester United's players from the Allianz Arena…

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Andre Onana (4/10):

Committed a horrendous error which galvanised Bayern and the home crowd after their sleepy start and it was all downhill from there for the visitors. Didn't get close to Gnabry or Kane's goals but did do well to turn away Choupo-Moting's later strike.

Diogo Dalot (5/10):

Was powerless to stop Musiala's run into the area to set up Gnabry's strike, underling the difference in defensive quality between him and the injured Aaron Wan-Bissaka. Did make a brave late interception which prevented a worse scoreline, however, and showed promise going forward.

Victor Lindelof (6/10):

Made a series of crucial interventions and looked far more alert than his defensive partner.

Lisandro Martinez (4/10):

Poor decision-making for the second goal, leaving Gnabry unmarked as he focused on Kane, who was being covered by Reguilon.

Sergio Reguilon (7/10):

One of United's best performers. Solid and brave defensively and gave his opposite number Laimer a lot to think about down the other end.

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Christian Eriksen (4/10):

Frequently over-powered and saw several passes intercepted. Missed a glorious chance to give United the lead, then was harshly punished for an accidental handball by VAR. The first player to be taken off.

Casemiro (5/10):

Made a positive start but once Bayern were ahead he struggled to keep them at bay. Lost track of Musiala for the second goal but kept fighting and his two goals kept the scoreline dignified.

Bruno Fernandes (4/10):

Another poor performance from the captain. Unable to influence proceedings in any meaningful way.

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Facundo Pellistri (5/10):

A surprise inclusion in the starting XI and initially did well, causing some early problems and making United look more organised than when they deployed the midfield diamond against Brighton. But his lack of experience and physical prowess soon showed.

Rasmus Hojlund (6/10):

Crucially got off the mark, even if his goal came courtesy of a big deflection. Worked hard off the ball.

Marcus Rashford (5/10):

Had the run of Laimer down the left wing but had little overall impact.

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Scott McTominay (5/10):

Gave the team a little bit more balance after replacing Eriksen.

Anthony Martial (6/10):

Had a surprisingly big impact despite coming on in the 81st minute, showing good hold-up play and setting up Casemiro's first goal.

Alejandro Garnacho (N/A):

Came on in the 81st minute which was too late for a player of his quality when chasing the game.

Erik ten Hag (6/10):

Picked a sensible starting XI and his team began well. His changes mostly worked but again he made them too late. Can't escape criticism after a third straight defeat.