Galatasaray president Unal Aysal has revealed Wesley Sneijder has a release clause set at 20 million euros amid reported interest from Manchester United.
Sneijder, 30, joined Galatasaray in January 2013 after being frozen out at Inter Milan, but it is rumoured that United have revived their interest in the player this summer following the appointment of current Netherlands coach Louis van Gaal.
Sneijder told the media last month that he would find it difficult to resist an offer to play under Van Gaal at Old Trafford and Aysal admits Gala could not prevent him leaving if his release clause is met.
"Sneijder is a good player," he told the media at a news conference. "We want to keep him at Galatasaray.
"If Galatasaray receive an offer of 20 million euros, we do not have the luxury of saying no. That is stipulated in the contract. All I can say is that if any club pays us 20 million euros and he wants to go, we can't force him to stay because it is written in the contract."
Aysal was appearing at a news conference to unveil new coach Cesare Prandelli, who has taken charge of the Turkish giants after resigning as Italy boss.
Prandelli told the press he had watched Sneijder's performances for Netherlands at the World Cup this summer "with interest" and added: "He is one of the most important players for Netherlands and Galatasaray."