MARK Williams' reign as Embassy world champion could end in Sheffield today.

The world number one was due to re-start against Joe Perry with a 10-6 deficit after just avoiding defeat with a session to spare.

Perry took both opening sessions 5-3 and required only three of the remaining nine frames to cause another major shock.

Perry was 250-1 to win all eight of yesterday afternoon's frames but the odds came tumbling down as he captured the first four.

Williams ensured the pair's return today by outscoring his opponent 162-0 over the next two.

But Perry looked determined to reach the quarter-finals for the first time in his career.

The former European and China Open finalist clinched a scrappy 15th frame as Williams still could not find any inspiration.

Williams did manage to reduce his arrears to more manageable proportions in the last frame of the afternoon.

However, it remained touch and go whether he will still have a hold on the trophy by lunchtime today.

No player has retained the title since Stephen Hendry in 1996 and Williams has his work cut out just to reach the last eight.

He became a father for the first time exactly a week ago and scraped through his opening match against fellow Welshman Dominic Dale.

A week at home with fiancee Joanne Dent and baby Connor has not enabled him to find an extra gear for this game and it will take a monumental effort to rescue the match.

Joe Swail prevails over Anthony Hamilton in another second round encounter.

Swail, responsible for the first-round defeat of 1997 world champion Ken Doherty, compiled breaks of 79, 67 and 78 to lead 3-0.

Hamilton, back in action less than 24 hours after his victory over six-time champion Steve Davis, hit back to trail 3-2.

Belfast-born Swail responded with further runs of 98 and 73 before world number 20 Hamilton took the last frame of their opening session.

They play a possible 17 further frames today with the winner to meet Ronnie O'Sullivan or Andy Hicks.