Date: 17 April-3 May 2010 Venue: The Crucible, SheffieldCoverage: Live coverage each day on BBC Two, BBC Red Button and BBC Sport website (UK only), updates on BBC Radio 5 Live.

Ronnie O'Sullivan

Ronnie O’Sullivan and Mark Williams were locked at eight frames apiece going into the final session of their second-round World Championship battle.

Resuming at 4-4, O’Sullivan took the first frame before Williams won the next three to lead 7-5, and later 8-6.

But, despite frequent wayward shots, O’Sullivan stayed in touch and won the session’s final two frames to level it.

Ali Carter leads Joe Perry 10-6, Ding Junhui was 5-3 up on Shaun Murphy, and Stephen Hendry and Mark Selby are 4-4.

O’Sullivan began shakily, overcutting a black in a potential break-building position.

However, two-time champion Williams could not capitalise and O’Sullivan got back to the table to rattle off a break of 86 for the lead.

An unlucky foul cost O’Sullivan the next frame as he attempted to break into the bunch off the yellow, a red dropped in and Williams notched 54 to go on and win the frame to restore parity.

And when an O’Sullivan break ended at 43 in the next frame, Williams seized his chance again, eventually winning the game by a single point courtesy of a doubled black into the left middle pocket.

Another fluffed O’Sullivan pot attempt gifted Williams the following frame, as he fell just one point shy of the match’s first century.

It looked ominous for the world number one when Williams clawed his way back to within three points of his 51-0 lead in frame 13.

However, Williams conceded 12 points on an O’Sullivan snooker as the world number one went on to take the frame by a 30-point margin and reduce the gap to one.

But more erratic cueing from O’Sullivan helped Williams pull away again to 8-6.

However, O’Sullivan regained his rhythm to take the next frame with a 66 break and then came from 32-0 down to win the last frame of the session with a break of 72 and level the match and set up an intriguing nine-frame shoot-out on Monday afternoon.

Carter, meanwhile, pulled four frames clear of fellow Englishman Perry in a repeat of the 2008 semi-final which the former won before losing to O’Sullivan in the decider.

Carter got off to a flier, claiming the first four frames of the session, including a 100 break in the 11th.

Perry stopped the rot, though, as the final four frames of the evening were shared. That match will also be played to its conclusion from 1430 BST on Monday.

Earlier, seven-time champion Hendry was left to rue a missed opportunity to build an early lead over Selby.

With the score at 4-2, Hendry led 75-0 in the seventh frame only to concede 11 points on two snookers before Selby potted all the remaining balls to steal the frame from under the Scot’s nose.

Buoyed by his comeback, 2007 runner-up Selby levelled the match in the closing frame of the session with a break of 87.

On the other table, Chinese number one Ding Junhui eked out a 5-3 lead over 2005 winner Shaun Murphy.

In a scrappy affair, Murphy took the first frame thanks to a 53 break, however, Ding notched breaks of 68, 103 and 78 on his way to a 4-2 advantage.

Murphy, 27, narrowed the deficit to one in the next frame but UK champion Ding took the final frame of the session – a cagey safety shot-riddled battle which ended when Murphy, requiring a snooker, potted the pink as he attempted to move it away from the pocket.

Like the Hendry-Selby clash, this match will also resume on Monday morning.

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