London ? Lennox Lewis hinted he might retire or at least demand more money to fight in an interview published Sunday.

The 36-year-old Lewis, who knocked out Mike Tyson in June to retain the WBC and IBF heavyweight titles, told The Observer that he has little left to prove.

The British boxer added that leading challengers Vladimir Klitschko, Chris Byrd and WBA champion John Ruiz don’t pose a big enough challenge.

“What else is there for me to prove? That I can be Evander Holyfield and not know when to quit? Or prove that I’m stuck in the sport and won’t get out until I’m speaking so people don’t understand me?” Lewis told the newspaper.

“So I think this is a great point for me to say, ‘Yo, I’ve gone through so much and I’ve even done it without getting Don King involved.'”