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Matthew Stevens opened up the second session with a 115 break

World Championship Venue: Crucible Theatre, Sheffield Dates: 18 April-4 May Coverage: Watch live on BBC TV, HD, Red Button, Connected TV, online, tablets, mobiles and BBC Sport app. Full details here.

Two-time finalist Matthew Stevens set up a World Championship second-round meeting with Ronnie O'Sullivan by comfortably beating Mark Williams.

Stevens, 37, led his Welsh compatriot 7-2 overnight and a break of 115 in the first frame after the resumption set the tone as he secured a 10-2 win.

At 8-2, Williams called a foul on himself to let the world number 35 in and he closed out the match.

Elsewhere, Joe Perry reached round two with a 10-4 win over Zhang Anda.

The Chinese player won three frames at the start of the second session to trail 8-4 but could not narrow the gap further. Perry could face Shaun Murphy next - the 2005 champion leads Finland's Robin Hull 7-2.

Tales of the century Zhang Anda compiled a 132 break in defeat by Joe Perry, the fourth-highest in the tournament so far. There have been 21 centuries at the Crucible, Neil Robertson's 143 is still the highest break.

Wednesday was a day of emphatic scorelines at the Crucible with Ronnie O'Sullivan beating Craig Steadman 10-3 and Judd Trump taking a commanding 7-2 lead over another qualifier, Stuart Carrington.

Stevens was not in action long on day five in Sheffield as he stretched his advantage quickly, though Williams did briefly threaten a 147 in the final frame, potting seven reds and blacks.

"Matthew is playing as well as anyone in this championship," said BBC commentator Dennis Taylor as Stevens finished with a 73, his sixth half-century break in 12 frames.

Steve Davis' Sheffield Survival Guide

Stevens cited a new found happiness in his personal life as a reason for the his new-found form, having arrived in Sheffield without a ranking event title since the UK Championship in 2003.

But he consistently took his chances and after Williams' self-declared foul for striking the white twice, brilliantly screwed off two cushions when potting a blue to develop a telling scoring opportunity.

He is likely to need further improvement when he takes on O'Sullivan - who is seeking a sixth world title and comfortably has the better of the head-to-head record with the Welshman.