Celtic could have to face Gio Reyna in next week's UEFA Champions League showdown after the American international made a quicker-than-expected return to action for Borussia Dortmund.

The Hoops travel to Germany to face last season's runners-up in the competition, but they will be encouraged after BVB crashed to a shock 5-1 defeat to Stuttgart last week.

But the hosts were handed good news when manager Nuri Sahin revealed that Reyna - son of former Rangers star Claudio - has recovered from a groin injury and will be in contention against Celtic.

He said: "Things are looking good for Gio, surprisingly quickly too.

"We said that he would only be available after the international break, but the way things are going right now, it’s possible that he could be considered for the last two games before the break against Celtic and Union Berlin.

"Everything he’s doing looks very good.”

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And Sahin admitted he needed to take his share of the blame for that Stuttgart loss after initially slamming his players, ahead of tonight's derby with Bochum.

He said: "Of course it hit me hard too that we played a game like that. No one saw it coming.

"And I take responsibility for that myself.  That shouldn't happen, but now we're looking ahead.

"Everything was missing and I include myself because my in-game coaching was not the best either."