Germany coach Joachim Low will not risk Mats Hummels in the Euro 2016 clash with Poland on Thursday if the defender's injury problems persist.
The centre-back, who is set to join Bayern Munich this summer, missed Germany's Group C opener against Ukraine due to a calf problem, but has since returned to training.
However, Low has now revealed that centre-backs Jerome Boateng and Shkodran Mustafi will be selected again against the Poles unless Hummels makes a full recovery.
"He [Hummels] has trained twice with the team but not for too long," said Low. "It is important to see his final training session and then we'll talk to him to decide if he can play or not.
"I will not run any risk if he has any problems or doesn't feel 100 per cent. I can't predict that right now – it will be after the final training [session].
"He told me he felt quite well. He coped with the effort and performance shown in training but I have to talk to the physicians before I can tell you more."Experienced midfielder Bastian Schweinsteiger scored Germany's second goal in the 2-0 victory against Ukraine, but Low has now indicated that the Manchester United man is not fit enough to play an entire match.
"You can see every day that he is proceeding, his physical condition is excellent, and he has worked very hard. He was a little tired lately but now he's full of energy," he added.
"He doesn't have the condition for 90 minutes but he is well integrated into the squad in training.
"His role is ever more important; he's an emotional leader who is being listened to by other players.
"He has won everything you can win. He is a world champion, he's won the Champions League. He has a big role and is very important for our squad."