Two-time defending world champion Paolo Bettini of Italy confirmed on Saturday he will retire after the final race of the world road race championships.

The 34-year-old Italian, a favorite to win gold in the men's road race here on Sunday, was emotional as he said the men's road race on Sunday would be the last race of his career.

"I've had a lot to reflect about the past few months and the idea has just grown in my head," said Bettini. "I've decided, in all serenity, to end my career."

Bettini has been one of the most successful one-day racers of the past decade, winning numerous classics as well as stages in all three major Tours.

Crowned the Olympic champion in 2004, Bettini lost his title last month to Samuel Sanchez of Spain.

The men's road race will be contested over 260.25km on Sunday.

The wearer of the coveted world champion's rainbow jersey the past two years, Bettini said it would be his last chance to put his world class on display.

"Cycling has given me a lot and I hope I've given something back. I've got no regrets," he added, fighting back the tears. "The world championship has kind of become my race. I'm here to give it one last shot, and I have the determination to go out and fight for another win, whatever it takes."

The Italian cycling star hinted at a possible end to his sterling career recently after his team, Quick Step, refused his request for a generous, final-season contract.

He added: "I'm sure I've made the right decision. I've given this a lot of thought over the past few days and I've felt nothing to contradict what I'm feeling."