Borussia Dortmund boss admits pre Celtic issues and slams 'unacceptable' team

Borussia Dortmund boss Nuri Sahin has ordered his dodgy defence to cut out the mistakes or risk being punished by Celtic.

The Champions League runners-up had to come back from two goals behind to overcome Bochum 4-2 in the Bundesliga on Friday night. The nervy comeback came just a week after the humiliating 5-1 defeat away to Stuttgart, with pressure mounting on the German giants.

Dortmund did get their Euro campaign off to the perfect start with a 3-0 triumph at Club Brugge but Sahin insists his backline must waken up before Brendan Rodgers' in-form side rock up to Signal Iduna Park on Tuesday night.

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He said: "There are clearly issues we still need to address before our next game against Celtic because going two goals down is unacceptable. Our defending needs to be looked at because they were 2-0 up and had a chance to make it 3-0, which would have given us a huge problem.

"We can't start suddenly playing when we are two goals down. That said, I was absolutely delighted with the application shown by the players because they refused to give up and fought back to win.

"We stayed calm, kept playing and deserved to win. We showed huge character. Sometimes you have to suffer to learn. I like a team who fight back to win - Bayer Leverkusen did that on many occasions last season."

Key man Marcel Sabitzer sat out the game while wonderkid Jamie Gittens hobbled off with a knock but Sahin expects both to be available. Sahin added: "Marcel had a very slight knock and we decided not to risk him. And Jamie was only suffering from cramps. Both will be available for the Celtic game."