Despite Borussia Dortmund's continual denials that they have agreed a deal to sell Lewandowski , the legendary midfielder appeared to add fuel to the speculation that he will leave, but stay in Germany.
"I was on the road this week. I heard that Lewandowski has an agreement with Bayern. Only the date of the move remains undecided,' Matthaus told Sky Bundesliga.
"Lewandowski's contract runs out in 2014 and Dortmund will only get a fee in 2013 - surely a high fee. I heard it was something between £20m-£25m, otherwise he will go to Bayern for free next year."