A tired appearance is enough - especially for Julian Nagelsmann.

The short, tight-lipped answers of the sometimes over-ambitious Bayern coach clearly showed how much this Bundesliga damper in Köpenick annoyed him.

From the record champions' perspective, there shouldn't be a repeat of the Champions League start at Inter Milan.

"The energy level has to be like the games before," said Nagelsmann after the disappointing 1-1 draw in the top game at Union Berlin.

"We weren't 100% mentally alert in some situations."

Twice 1:1 – Munich, who seemed so unstoppable until recently, don't always win.

Against Borussia Mönchengladbach, that could still be attributed to "usury of chances", as Nagelsmann said.

Now his professionals have to process the first really disappointing performance of the season before the start of the group phase in the premier class at Inter Milan on Wednesday (9 p.m. in the FAZ live ticker for the Champions League and at DAZN).

Standing low, defending in a disciplined manner, clever fouls and ice cold in front of goal: Union strengths on Saturday are also said to be for Italian teams.

So is there a threat of the next tough attack against a defensive bulwark?

"Inter plays a bit differently," said Nagelsmann, but added: "It does have parallels, but I won't go into that much detail now, otherwise they might do something different." will restrict defending.

"I don't know, it's like that sometimes"

Goalkeeper Manuel Neuer came to a similar conclusion: "Maybe we see our chance that Inter will try to play more, that we will then win the ball in midfield and have a shorter way to the opposing goal." Nagelsmann beat the game in Köpenick powerfully on the mood.

His answer to the question about his explanation for the lack of energy: "I don't know, that's sometimes the case." That his team has slipped to third place for the time being?

On the fifth day of the game, he was "actually relatively sha...n't care".

He always wants to win, "that's why I answer briefly and I'm tense".

He also seemed annoyed that after just one game without absolute dominance there were questions about a lack of creativity: “We had 31 shots on goal against Gladbach.

I think that's creative enough," he said.

He also does not want to let a center forward debate after the departure of Robert Lewandowski in view of the usury of chances become an issue.

"How many goals did we score?

Plus 14 I think.”

The team would have needed more tactical discipline against Union.

"It was a bit more free spirit, and then it's difficult to provoke what we want to see from the opponent," said Nagelsmann.

Thomas Müller, who initially sat on the bench, saw, like his trainer, shortcomings in using the few opportunities: "In the other situations where we could have been dangerous, the last action just didn't quite fit and was a bit too unclean. "

Müller came on for young star Jamal Musiala, who was plagued by an injury.

"I felt like he's still not at 100 percent.

He kept doing this movement at the hips, rotating in and out,” said Nagelsmann.

That's why we didn't want to take any risks.

Bayern have to shake off the disappointment in Berlin.

"In a group phase like this, the opening game is simply very important for the feeling and the progression so as not to come under pressure," said Müller.

It is also a special game for the 32-year-old for other reasons.

He adores the iconic San Siro.

"It's not the most modern stadium anymore, but I've been there as a spectator since I was a kid and I'm still very impressed by the history," he said.

"If you've ever sat there in the upper ring, you know what's going on."