Central defender Dan-Axel Zagadou has injured the lateral collateral ligament in his left knee in training, Borussia Dortmund have announced.
Dortmund players have been training in small groups as they wait for a date for the Bundesliga season to resume, with football on hold in Germany due to the coronavirus pandemic.
Bundesliga clubs are set to meet on April 23 to discuss a potential return to action, while Zagadou will now begin rehabilitation in a bid to be available to play again this season.
Editors' Picks
"Over the coming weeks, Zagadou will work intensively with the club's rehab coaches in a bid to return to fitness and – provided the coronavirus pandemic allows for it – help his team in the remainder of the season," a Dortmund statement read.