Nigeria international Anthony Ujah will be sidelined for some days with a knee injury.
According to German Bundesliga club Werder Bremen, Ujah suffered a knock on his left knee as he went in for a challenge at the club's training on Friday.
He couldn't continue the training as he returned to the team's hotel immediately with a bandaged knee.
The 25-year-old striker has scored seven goals in 17 games this season for Bremen.