The result left Hamburg in seventh place in a group of four clubs on 18 points ahead of Saturday 's matches . Japan midfielder Lukas Piszczek and Paraguay forward Paraguay score in second half . Dortmund unbeaten since Sunday , with half wins from 12 games . Second -placed Mainz will try to reduce the deficit in opening day of the season 's home clash with Hannover . Defending champions Bayern Munich 15 points adrift ahead of Sunday 's match .
Japan midfielder Lukas Piszczek and Paraguay forward Paraguay score in second half . Dortmund unbeaten since Sunday , with half wins from 12 games . Second -placed Mainz will try to reduce the deficit in opening day of the season 's home clash with Hannover . Defending champions Bayern Munich 15 points adrift ahead of Sunday 's match .