Borussia Dortmund defender Mats Hummels has been ruled out of his side's Champions League clash against Arsenal due to a thigh problem.
The centre-back picked up the injury during the German outfit's 6-1 victory over Stuttgart in the Bundesliga on Friday and will sit out the home game against the Gunners on Wednesday.
"We tried everything but it has not improved yet," Dortmund's official website quotes coach Jurgen Klopp as saying. "It´s a 97.5% probability that he will not be able to play."
Dortmund are currently second in Group F but level with leaders Arsenal on six points.
