Bundesliga champions Borussia Dortmund have suffered an injury blow with news Shinji Kagawa will be out for up to three weeks.
The Japanese attacking midfielder tore ankle ligaments during a training session on Wednesday.
The 22-year-old was unable to feature for half of last year's campaign having broken his foot and is now set for another spell on the sidelines.
Kagawa, who has scored seven goals in the Bundesliga as Dortmund have opened a two-point advantage at the head of the table, will miss the next two top-flight encounters.
"He tore an ankle ligament in training on Wednesday and is expected to be back fit for the March 3 game against Mainz 05," the club said in an official statement.
The Japan international made his mark in the side when he replaced the injured Mario Gotze with the playmaker being ruled out for two months with a pubic bone injury.
Dortmund boss Jurgen Klopp must now make the trip to relegation candidates Hertha Berlin on Saturday with neither available for selection.
Kagawa has scored 15 goals in his 37 appearances for the league leaders since his arrival from Japanese outfit Cerezo Osaka in 2010.