New Borussia Dortmund boss Nuri Sahin slammed his own team after their first loss under him as they suffered a disastrous build-up to their next game in the Champions League against Celtic.
The Hoops will travel to Germany next week to face Dortmund after both sides got their campaign off to impressive starts after Celtic battered Slovan Bratislava 5-1 and BVB won 3-0 away at Club Brugge.
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But their preparations for playing against Celtic took a severe blow after they slumped to a shock 5-1 hammering at Stuttgart.
And Sahin was bitterly disappointed at his players' displays.
He said: "That was very sobering. You can't perform like that as Borussia Dortmund.
"That was a poor performance. I never want to see a display like that from us again.
"We weren't at it from the first to the last minute. It felt like we didn't win a single 50/50 tackle, you can't play like that.
"Now we need to address this bluntly and call things out.
"You can't play like that. You can find a million excuses, but none of them are valid."
