Bundesliga champions Bayern Munich have denied reports that they have agreed to sign Borussia Dortmund forward Robert Lewandowski.

Both German giants have been the talk of European football this week following their sumptuous Champions League performances where they crushed favoured Spanish duo Real Madrid and Barcelona.

But before their Champions League exploits, news broke that Bayern had agreed to sign Dortmund star Mario Goetze after meeting the midfielder's buyout clause surfaced, provoking controversy ahead of an enormous week for German football.

Robert Lewandowski
One of Europe's most coveted forwards in Lewandowski has not agreed a deal with Bayern. (Reuters)

Just 24 hours after the news of Gotze's imminent move, a number of reports suggested that the Bavarian club had also agreed to sign Dortmund's four goal hero from Wednesday night, Robert Lewandowski. German newspaper Bild suggested the Poland international had already signed two contracts with Bayern, one starting in 2013 and the other in 2014, when his current Dortmund deal expires.

But Bayern have dismissed such suggestions with a statement denying the existence of any contract between the player and the club.

The latest development will come as welcomed news for Manchester United, who have been credited with keen interest of their own in the forward. Sir Alex Ferguson is said to be an admirer of the forward, amid reports that the club would willing to depart with one of Wayne Rooney or Javier Hernandez to bring Lewandowski to Old Trafford.

But despite interest from the Premier League champions and incessant reports suggesting a deal is all but done, Dortmund manager Jurgen Klopp believes his highly regarded forward will still be at the Westfalenstadion next season.

"My understanding is that Robert will still be here next year," Klopp said. "The fact is that we are going very well this season. Why should we care about next year? Nobody knows what will happen next year."

Lewandowski's reputation as one of Europe's most lethal forwards was significantly enhanced after his performance against Real Madrid on Wednesday night. The 24-year-old's four goals leaves the prospect of an all-German Champions League final at Wembley a tantalisingly realistic one, following Bayern's own demolition job on Barcelona.