Manchester United’s Champions League return ended in disappointment as Harry Kane struck from the spot for Bayern Munich in an entertaining 4-3 win kicked off by Andre Onana’s clanger.
Absentee-hit United began brightly enough at the Allianz Arena, only for Serge Gnabry to score shortly after ex-Manchester City forward Leroy Sane’s effort squirmed past summer signing Onana.
Rasmus Hojlund netted his first goal for the club but Kane quickly slammed home a penalty, with Casemiro scoring either side of Mathys Tel’s stoppage-time strike as the Red Devils suffered a fourth defeat in five matches.
Few could argue with the eventual outcome, but United had started brightly in Bavaria and should have gone ahead through Facundo Pellistri or Christian Eriksen inside four minutes.
Bayern, who were without suspended boss Thomas Tuchel on the touchline, shook off initial sluggishness, with Sane’s strike beating distraught Onana before Gnabry fired home four minutes later.
Hojlund’s effort off the heel of Kim Min-jae shortly after half-time brought hope to Erik ten Hag’s men, only for Eriksen to soon be adjudged to have handled.
Ex-Tottenham team-mate Kane scored the resultant spot-kick, with Casemiro’s brace sandwiching Tel’s strike during a dramatic conclusion to the Group A opener.
The visitors found the net in the 88th minute as Casemiro managed to direct home having failed with his initial effort, sparking a box-office conclusion.
Thomas Muller hit the post in stoppage time, before fellow introduction Tel fired into the roof of the net.
Casemiro headed in a Bruno Fernandes free-kick but there was no time to snatch a draw.