The Poland international had just doubled Bayern’s lead with a cool finish from the edge of the box when he pulled up, clutching his hamstring.
He attempted to play on for a few minutes but then signalled to the bench that he needed to come off.
The 29-year-old could now miss Tuesday’s trip to Celtic, with Jupp Heynckes’ men going into the match in second, three points behind Group B leaders Paris Saint-Germain.
He could also be a doubt for Bayern’s game at his former club Borussia Dortmund in the Bundesliga next Saturday.
— FC Bayern English (@FCBayernEN) October 28, 2017