Mario Gotze pulled up lame in Borussia Dortmund’s training session on Tuesday, putting his fitness in doubt ahead of the Champions League final.
The star attacking midfielder was thought to be winning his fitness battle, after damaging a thigh muscle during Dortmund’s semi-final against Real Madrid.
However, the 20-year-old was unable to complete training on Tuesday, and he is now unlikely to be fully fit to face Bayern Munich at Wembley on Saturday night.
"Mario has felt something again in his hamstring," Dortmund’s general manager Michael Zorc told Bild.
"That is why he stopped. We don't know how bad it is and whether he is still suffering from it."
The question now is whether or not Dortmund will risk planning around, and starting, a half-crocked Gotze in the final, despite his major influence on the way the team plays.
Fortunately for Dortmund, they are still good enough to give Bayern a serious run for their money in the final even if Gotze cannot play, according to German legend Lothar Matthaus.
"The big question is whether (Gotze) can play, but then the question is how fit he is," Matthaus told Sky television.
"He has not played for the past three and a half weeks. I would say Mario cannot be 100 per cent fit.
"If anything, then maybe he could take his place on the bench next to Jurgen Klopp because Dortmund are not reliant on Gotze.
"It would also be his last game for Borussia against his future club so it would not be easy for Mario Gotze and it would not be easy for Borussia Dortmund, and it would not be easy for Jurgen Klopp either."