Bayern Munich have confirmed Serge Gnabry tore his thigh muscle during their Bundesliga win against RB Leipzig.
Gnabry was replaced by Franck Ribery during the first half of Wednesday's 1-0 success, earned thanks to the substitute's late strike.
Bayern announced Gnabry will be unavailable for Saturday's game against head coach Niko Kovac's former club Eintracht Frankfurt.
But the Bundesliga champions did not offer any potential timescale for the 23-year-old's return to action in a medical update.
"The champions will also have to manage without Renato Sanches," Bayern added in a statement on their official website.