Lewandowski’s contract expires next year and he has no intention of agreeing a new one, with reports that Bayern Munich want him.
Maik Barthel told Sport Bild: “We have reached an agreement with a club and intend [him] to move this summer.
“There is a very interesting offer for Robert which fulfils entirely the demands set by Dortmund and also the demands of Robert. Dortmund have assured us that Robert can move at the end of the season under these conditions. We stick to agreements and now it’s up to the clubs to sort things out.”