Bayern Munich midfielder Bastian Schweinsteiger is doubtful for their Super Cup game against Chelsea on Friday in Prague after straining his ankle in a 1-1 Bundesliga draw at Freiburg on Tuesday.
"He strained his ankle," coach Pep Guardiola told reporters. "Tomorrow there will be a medical check. I hope he can play on Friday but we do not know that yet."
"It does not look good," said captain Philipp Lahm.
Champions League winners Bayern, who take on Europa League champions Chelsea, are already without their Spain midfielder Thiago Alcantara who had surgery on his right ankle this week.
Holding midfielder Javi Martinez is just returning to full fitness after an abdominal injury.
Image: Bastian Schweinsteiger of Bayern Muenchen
Photograph: Alex Livesey/Getty Images
US Open: Federer, Djokovic, Azarenka cruise; Stosur stunned
Newcastle's Cisse splits with model girlfriend to focus on career
Will Maria Sharapova do a Murray?
PHOTOS: The sexiest female tennis players at the US Open
Belgian Grand Prix: Off the track!