Bayern Munich manager Thomas Tuchel admitted he felt "a little bit jinxed" after center-back Dayot Upamecano tore his hamstring in Wednesday's 1-0 victory over Union Berlin.
Upamecano did not return to the pitch in the second half after feeling sore late in the first, with Tuchel claiming the France defender had a "hamstring tear."
"With a hamstring tear, we talk about (missing) weeks, not days," Tuchel said, revealing that "he's already been assessed, and we have a diagnosis. "
Tuchel told reporters he felt "a little bit jinxed" because fellow first-choice center-back Kim Min-jae was away on Asia Cup duty.
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"Of course, it's incredibly bitter for him and us in his form.
"He's almost irreplaceable.
"He was in absolute top form for weeks. His ambition, his desire to win, and his physicality are outstanding.
"It hurts us a lot."
Tuchel said midfielders Konrad Laimer and Joshua Kimmich were also under injury clouds, saying the club would "wait and see... I'm a little bit more worried about Konnie (Laimer) than I am about Josh."
Bayern's narrow victory, courtesy of a second-half goal from Raphael Guerreiro, puts them four points behind league leaders Bayer Leverkusen.
On Saturday, Bayern will play away at Augsburg.
