Noussair Mazraoui is away at AFCON with Morocco, while Kim Min-Jae is with South Korea on Asian Cup duty.
Serge Gnabry is ruled out with a muscle injury, while backup keeper Daniel Peretz has a ligament problem.
Bouna Sarr may have played his last football for the club after suffering an ACL injury. Tarek Buchmann has undergone surgery on a thigh injury.