Bayern crashed to their worst-ever cup defeat and heaviest overall loss in 43 years in a 5-0 humiliation at Borussia Moenchengladbach.

Now they go to fifth-placed Union, who are unbeaten in 21 home games, aiming to redeem themselves and to stay top of the Bundesliga.

“We have the ambition to be champions who pick themselves up again,” Nagelsmann told reporters on Friday.

“Results like this should be a one-off,” he added while also admitting “you don’t simply shake off games like this one.”

But the coach also said: “First and foremost who showed that we are humans and not machines.”

Nagelsmann said it would have probably not made a difference if he had in been present at the game and not in isolation after contracting the coronavirus.

He said he has talked to team leaders and club officials and will also get the team ready for Union via a live-video link before hoping to return after two weeks of quarantine next week in the Champions League against Benfica.

Looking at Union, he said “we have to play at the limit” in order to be successful.

Union, who last season held Bayern to two 1-1 draws, are aware of what they will be facing.

“The task is tough. It doesn’t make a different if Bayern arrive with some special anger,” coach Urs Fischer said.