Swiss midfielder Tranquillo Barnetta fired the visitors in front after 19 minutes with a low shot from inside the area.

Renato Augusto added the second three minutes after a solo effort to give Leverkusen an opening win.

Egyptian forward Zidan missed the game as he is still nursing a serious knee injury he sustained last April.

The former Mainz, Werder Bremen and Hamburg man is expected to return to action in October.

Dortmund thrashed Azerbaijan's Garabagh Agdam 4-0 in the first leg of their Europa League playoff on Thursday.