Live Snooker: The World Championship Hazel Irvine presents coverage of the opening day's play at the Crucible Theatre in Sheffield, featuring Ronnie O'Sullivan and Ricky Walden in first-round action against Marcus Campbell and Michael Holt respectively. The final and most prestigious ranking tournament on the calendar features 32 of the world's finest, with each needing to win 10 frames at this stage to progress to the second round. The commentary team includes Steve Davis, Ken Doherty and Stephen Hendry. Coverage continues on BBC Two