Bayern Munich forward Toni Kroos left the door open for a switch to the Barclays Premier League in the summer.
Tim Sherwood claims the "silence is deafening" from the Tottenham board amid speculation he could be replaced as manager.
Reports in Germany on Friday morning suggested Lewandowski had signed a pre-contract with the Bundesliga champions and would move south either this summer - should Bayern agree a fee with Dortmund - or in 2014 when he becomes a free agent.
But a Bayern statement read: "FC Bayern, contrary to these reports, do not have any contract with Robert Lewandowski."
Dortmund insist they have not received an offer for the Poland international and have put a new deal to the 24-year-old following his virtuoso display on Wednesday, in which he scored four times as Jurgen Klopp's men thrashed Real Madrid 4-1.
"It would be negligent of us not to try to keep probably the best striker in Europe," general manager Hans-Joachim Watzke told the Bild newspaper.
"It's true that we have discussed new conditions once again."