Lewandowski, who will join Bayern Munich next season, is top of the Bundesliga scorers' list with 15 goals. He has added another six in the Champions League.
"Upon his arrival he will be checked by the team doctor to determine the extent of his injury," Dortmund said in a statement.
Dortmund, second in the league behind Bayern, are also in action in the Champions League later this month when they host Zenit St Petersburg in the second leg of the round of 16 after beating them 4-2 in Russia with Lewandowski scoring twice.
- Sports & Recreation
- Bayern Munich