Schweinsteiger picked up a calf injury during Bayern Munich’s 4-0 win over Nurnberg on Saturday.
“Bastian took a kick to the calf. That is normally a very difficult injury, which takes time to recover,” explained Bayern coach Jupp Heynckes.
“We have to wait and see whether or not it is a calf strain. Then we can say more, but at the moment it doesn’t look good.”