The Pole struck twice in the first half and slotted in his third goal in the 54th minute after Arturo Vidal had put the hosts ahead in the 17th minute .
The Pole has netted 19 times in the Bundesliga this season .
The Pole , who has netted 19 times in the Bundesliga this season , struck twice in the first half and slotted in his third goal in the 54th minute after Arturo Vidal had put the hosts ahead in the 17th minute .