Karim Adeyemi scored the opening goal with his heel and then got injured while setting up Donyell Malen for the second goal with a cross.
Borussia Dortmund forward Karim Adeyemi has been ruled out for about three weeks with a left ankle injury.
All three teams have 43 points after 21 matches.
He is set to miss Bundesliga games against Hoffenheim and Leipzig, the visit to Chelsea in the Champions League and the Ruhr derby against Schalke.
Get well soon.