“Kingsley sustained an injury during training and is under examination now,” Bayern coach Julian Nagelsmann told a news conference.
Koeman is expected to be absent from the Bavarian team, even after the end of the international matches calendar period this month.
Bayern Munich had won 2-0 against Inter Milan in the Champions League, but it hosts Stuttgart after drawing 1-1 in the last two matches in the German League, but this does not worry Nagelsmann.
“We scored many goals in the first few matches, we had many chances against Union Berlin and Borussia Moenchengladbach,” Nagelsmann said.