Borussia Dortmund forward Robert Lewandowski has not ruled out leaving the Bundesliga champions after this season.
Lewandowski, 24, has reportedly attracted interest from a number of European clubs including Bayern Munich, Manchester United, Chelsea and Juventus.
The player recently reiterated that he has two years left on his contract but, speaking to Bild, he said: "I don't set myself any limits. I don't know what will be after this season.
"I can't and don't want to rule out anything. This would not be professional."
Asked about a possible move to Bayern, the Poland international said: "That will always be interesting and you have to consider it. It is such a big club".
He added: "I have another two years on my contract. This is a long time. I don't have to decide today if I extend it or not. But, like I said, I only concentrate on Borussia right now."
Lewandowski, who has played 69 league matches for Borussia Dortmund, has yet to score this season.