"We will be treating him for one month then we'll see," Muller-Wohlfahrt told the Bavarians' official website. "But we are well on schedule."

France star Ribery sustained a serious left knee ligaments damage. His injury is considered to be pretty similar to the one that former Brazil great Ronaldo was suffering between 2000 and 2001.

Ribery missed his Bayern's pre-season preparation for the same injury, then he got back to action to suffer a relapse.