Ronnie O'Sullivan of England competes against his compatriot Stuart Bingham during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Stuart Bingham of England competes against his compatriot Ronnie O'Sullivan during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Ronnie O'Sullivan of England competes against his compatriot Stuart Bingham during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Stuart Bingham of England reacts during the quarterfinal of the World Snooker Championships against his compatriot Ronnie O'Sullivan in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Ronnie O'Sullivan of England competes against his compatriot Stuart Bingham during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Ronnie O'Sullivan of England competes against his compatriot Stuart Bingham during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Stuart Bingham of England competes against his compatriot Ronnie O'Sullivan during their quarterfinal of the World Snooker Championships in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)

Ronnie O'Sullivan of England reacts during the quarterfinal of the World Snooker Championships against his compatriot Stuart Bingham in Sheffield, Britain, April 30, 2013. O'Sullivan leads Bingham 7-1 after the match Tuesday. (Xinhua/Wang Lili)