LONDON (AP) 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"."

Asked to make a definitive statement about his future, Lewis said: "Put it this way, my price has gone up.

"If they want me to fight those guys, they're going to have to pay me money just to get me back into training. From now on it's strictly a business decision."

The information contained in the AP News report may not be published, broadcast or redistributed without prior written authority of The Associated Press.