Sami Khedira has undergone an “arthroscopic revision” on his left knee, with no timetable yet set for the 27-year-old’s return.
Khedira recently suffered a left hamstring injury, which caused a rift between the club and the German national team.
Due to Khedira’s injury and Xabi Alonso’s departure before the summer transfer deadline, the club will need to rely heavily on Toni Kroos and Luke Modric, as well as youngster Asier Illarramendi.