However, for the Norwegian successor, who limped off the pitch halfway into the second half against Bayern Munich, it does not seem that serious.
Dortmund writes on his Twitter account that the Norwegian is not available against Paderborn. On the Bundesliga website it says that he is injured in the knee.
It's worse with midfielder Mahmoud Dahoud.
- After Wednesday's match against Bayern Munich, we have been told that Dahoud will be forced to stand for the rest of the season, says manager Lucien Favre, according to the club's Twitter account.
Dahoud is also injured, according to the Bundesliga website.
Following Bayern Munich's victory in Tuesday's series finale, they lead the league, with a seven-point lead to Dortmund. Six games remain to be played.