Borussia Dortmund striker Robert Lewandowski has denied reports suggesting he has signed for title rivals Bayern Munich.

The Polish international, 25, has been linked with the European champions since the summer after Bayern Munich sold strikers Nils Petersen and Mario Gomez. 

It has been thought that Lewandowski would follow in the footsteps of former teammate Mario Gotze, who made the switch from Borussia Dortmund to Bayern Munich in the spring. 

It has been revealed recently that Lewandowski has a clause in his contract, allowing him to sign a pre-contract with Bayern in January. 

Reports in recent days have suggested Lewandowski has signed the contract making him a Bayern Munich player.

Speaking to TV station SPORT1 a few days ago, Lewandowski had said: "Yes, because then I can officially sign a contract.

"We still have to wait a bit but I say I think in January I can go."

However, Lewandowski has been quick to play down these rumours, telling German newspaper Bild that he only meant he can confirm his future in January, and reiterated his desire to leave Dortmund.

The pre-contract agreement clause has already played it's part in Germany earlier this year, when the Bundesliga saw Lewis Holtby sign for Premier League outfit Tottenham having agreed a similar deal.

Dortmund loathe to lose their star striker as they are particularly reliant on the Polish star - he has so far scored five goals this season, the second highest at the club.

Lewandowski netted 36 times for the German outfit last season in a campaign where he really shot to prominence, particularly after scoring four against Jose Mourinho's Real Madrid.

Although being challenged for his place at Westfalenstadion by new signing Pierre-Emerick Aubameyang, he has remained in form and remained one of Europe's deadliest strikers.

Bayern Munich and Borussia Dortmund are both on 16 points so far this season, as their intense rivalry across both domestic and European competitions this season continues into the new season.

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