Robert Lewandowski is considering his future at Borussia Dortmund.

The Poland striker is a top target for Manchester United and Chelsea, while BVB are pushing him to open new contract talks.

"I have a contract for two more years. That's a long time. No, I don't have to decide today whether or not to renew. I will not set limits. I do not know what will happen during the season. You cannot rule anything out," confessed Lewandowski.