Borussia Dortmund have denied Manchester United target Robert Lewandowski has agreed a deal to leave the club this summer and insist they have no interest in selling him.

Sir Alex Ferguson has been heavily linked with a move for the Poland international but reports emerged in Germany this week claiming Bundesliga giants Bayern Munich led the race for his signature.

According to German magazine Der Spiegel, Bayern have already beaten Manchester United to Lewandowski and agreed terms with him.

However, Dortmund have refuted these claims and insisted they wanted to make a new contract offer rather than discuss moves to the Allianz Arena or Old Trafford.

“It's just a bubble of speculation, there is absolutely zero substance in the reports, there's is not even a primary source - that really gets on my nerves,” the Bundesliga champions’ general manager, Joachim Watzke, is quoted as saying by Sky Sports.

"The fact is, Robert has a contract with us until 2014 and we want to extend that."

However, Ferguson and Bayern may be encouraged by Watzke’s further comments as he reveals there is currently no agreement with the 24-year-old and opened the door to a transfer if Lewandowski refuses to extend his deal.

It is difficult to see where Lewandowski would fit in at Old Trafford, should a transfer become possible.

Ferguson already has Wayne Rooney, Robin van Persie, Javier Hernandez and Danny Welbeck in his first team forward line.

Meanwhile, Bayern are preparing for the arrival of Pep Guardiola this summer, with the former Barcelona boss set to become the Bavarians next manager.

Such is Guardiola’s reputation, Lewandowski could be swayed to reject the riches on offer in England.

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