Bayern Munich have warned Franck Ribery's suitors it would take a 'crazy' offer for them to sell the Frenchman.
Ribery's future at the German titans has been the subject of conjecture for the last few months with a number of clubs chasing his signature.
Manchester United have been strongly linked with a move for Ribery as a possible replacement for Cristiano Ronaldo, while Real Madrid are also thought to be keen on luring the France international to the Bernabeu.
Bayern are reluctant to sell the talented attacker and general manager Uli Hoeness only a mammoth offer would change their minds.
"We have said that we will only negotiate under certain conditions," Hoeness told Tz.
"Namely, when another club does something crazy."