Borussia Dortmund CEO Hans-Joachim Watzke has refused to respond in detail to Robert Lewandowski's remarks that he feels "cheated" by the Dortmund management.
On Wednesday, the 24-year-old Poland international told Polish papers FAKT and Rzeczpospolita he believed he had been treated unfairly over his desire to join Bayern Munich and added: "I don't know if the situation will fail to leave a mark on me."
In comments over the weekend, Lewandowski had said that although he "had problems" with "certain people" at the club, he would give it his all for Dortmund and "it does not matter what happened".
Watzke told Dortmund paper Ruhr Nachrichten: "I don’t speak Polish. I only know what he said in the German media, and that was OK. I am not interested in what is written in foreign media."
Dortmund coach Jurgen Klopp added that there had not been any problems within the team, saying: "Robert trains hard and gives it his all. It would be nice if this topic could be closed soon."
Lewandowski, who scored all four Dortmund goals in the first leg of last season's Champions League semi-final against Real Madrid, had been keen to join champions Bayern, but Dortmund told him he had to see out his contract before leaving on a free next summer.