Borussia Dortmund have parted ways with their manager, Nuri Sahin, following a 2-1 Champions League defeat to Bologna on Tuesday.

The German Bundesliga club, last season's Champions League finalists, are currently struggling in 13th place in their group and sit 10th in the Bundesliga, trailing league leaders Bayern Munich by 20 points.

Sahin, who took over as head coach last summer after Edin Terzic's departure, acknowledged the team's underperformance. "Unfortunately, we have not managed to live up to Borussia Dortmund’s sporting ambitions this season," Sahin said in a statement released by the club. "I wish this special club all the best."

Speculation has already begun about Sahin's potential replacement, with former Manchester United manager Erik ten Hag reportedly linked to the role. The Dutch coach, who left the Red Devils in October, has been spotted visiting Dortmund recently.