Borussia Dortmund are no longer ruling out the departure of €25 million-rated forward Robert Lewandowski at the end of the season, CEO Aki Watzke has told Spiegel online.
Lewandowski, 24, is under contract until 2014 - meaning Borussia would need to sell him in the summer in order to bring in a large transfer fee. He is attracting interest from clubs including Real Madrid, Bayern Munich, Manchester United and Manchester City.
Contract talks with the Poland international have been on a hold for some time, and he is reported to be eyeing a move away from the German champions.
"If Robert does not extended his contract, we will proceed as always," Watzke said. "Us three [coach Jurgen Klopp, general manager Michael Zorc and Watzke] will sit down together and discuss what to do next. The result is totally open."
He said Dortmund's aim remained to extend Lewandowski's deal but that if contract talks failed the club would look to cash in. Dortmund signed him from Lech Posen in 2010 after lengthy negotiations.
Earlier, Dortmund had ruled out the possibility of a move away for Lewandowski, saying they would rather keep him for the last year of his contract and then let him go on a free transfer.
After Borussia's mid-week 2-2 Champions League draw against Real Madrid, in which Lewandowski set up both Borussia goals, Real boss Jose Mourinho told reporters: "Lewandowski is a very ,very good player. And he is nearing the end of his contract."