Allister "Ali" Carter of England reacts while competing against Ben Woollaston of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Allister "Ali" Carter of England competes against Ben Woollaston of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Allister "Ali" Carter of England competes against Ben Woollaston of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Allister "Ali" Carter of England competes against Ben Woollaston of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Ben Woollaston of England competes against Allister "Ali" Carter of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Mark Selby of England competes against Matthew Selt of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)

Mark Selby of England competes against Matthew Selt of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)

Allister "Ali" Carter of England competes against Ben Woollaston of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, Britain, April 23, 2013. Carter won 10-4. (Xinhua/Wang Lili)

Mark Selby of England looks on during the first round match against Matthew Selt of England at the World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)

Mark Selby of England competes against Matthew Selt of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)

Mark Selby of England gestures during the first round match against Matthew Selt of England at the World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)

Matthew Selt of England competes against Mark Selby of England during their first round of World Snooker Championship at the Crucible Theatre in Sheffield, April 23, 2013. (Xinhua/Wang Lili)