Robert Lewandowski
Robert Lewandowski says he is ready to leave Borussia Dortmund this summer.

Robert Lewandowski has admitted he has informed Borussia Dortmund he wants to leave the club in order to join Bayern Munich.

Lewandowski is entering into the last year of his current deal with Dortmund, and the side are now faced with football's age-old conundrum over whether to sell him or keep him until he can leave for free next summer.

Both Manchester United and Madrid have made their interest known in the star, who scored 34 times for Dortmund this season, but both clubs will no doubt be aware that his preference is to join Bayern.

Jurgen Klopp has kept his cards close to his chest over the Poland international's future, with reports claiming he was hoping to send the star abroad to avoid competing against him for the Bundesliga title.

But the striker has told Bild Sport that he intends to leave for Bayern in the summer, thus ending speculation he could move to Manchester United or Real Madrid.

"We agreed with the club for quite some time [with Bayern]," he said. "I have informed the person in charge. I assume that now everything is clear and I may change to my desired club this summer. That would be the best for all parties. "

The draw of Bayern is obvious for any player looking for a move after the club won a historic treble last season and have now appointed one of the world's most highly renowned managers in Pep Guardiola.

Guardiola's presence at the club is one of the main reasons that Mario Gotze agreed to join, according to Klopp.

And with Lewandowski also set to join, it leaves Dortmund in a very difficult situation as they look to rebuild their team after losing out to Bayern in the league and Champions League lasts eason.

But with the Bavarian giants willing to offer €25-30m for the star, the German paper claims, Dortmund could certainly go into the market for a top-class replacement.