Stephen Maguire tumbled out of the Dafabet World Championship with a 10-9 defeat against Ryan Day.
Two-time World Championship runner-up Ali Carter struggled past qualifier Xiao Guodong in the first round.
Ken Doherty struck a blow for snooker's senior citizens as he enjoyed a first Crucible win in eight years by beating Stuart Bingham.
Round-by-round results from the 2014 World Championship at the Crucible in Sheffield.
A full draw and daily schedule for snooker's World Championship at the Crucible in Sheffield from April 19 to May 5.
Ronnie O'Sullivan moved a first step nearer a sixth world title after his no-frills opening win against Robin Hull.
Shaun Murphy was ahead in the fashion stakes but the 2005 champion trailed on the scoreboard against Jamie Cope.
Snooker's Dafabet World Championship is set for a facelift, in plans to be announced next week.
Ronnie O'Sullivan admits he is running out of time as he closes in on matching Stephen Hendry's magnificent seven.
Our tipster Jeff Anderson says Ronnie O'Sullivan is a worthy favourite for the World Snooker Championship.