Ding Junhui of China plays during his second round match against Stuart Bingham of England in the 2011 World Snooker Championship in Sheffield, England, April 24, 2011. [Photo/Xinhua]

Following are the quarterfinal fixtures at the Snooker World Championships on Tuesday:

Mark Selby, England, vs Ding Junhui, China

John Higgins, Scotland, vs Ronnie O'Sullivan, England

Judd Trump, England, vs Graeme Dott, Scotland

Mark Allen, Northern Ireland, vs Mark Williams, Wales