Ronnie O'Sullivan on verge of semi-final spot; Mark Williams unable to shake off Yan Bingtao

Class of '92 all closing in on World Championships semi-finals, with Ronnie O'Sullivan in particularly sparkling form.

Ronnie O'Sullivan took total command of his World Championship quarter-final against Stephen Maguire at the Crucible.

The six-time world champion built on a fine morning session to help himself to a 11-5 overnight lead in the best-of-13 clash.

Maguire, who was 2-6 down at the start of the evening session, appeared to give himself some hope of a comeback when he won the first two frames.

O'Sullivan quickly wrestled control of the match back, though, winning the next five frames in succession.

Maguire was able to stop the rot in the final frame of the session, but O'Sullivan retained his stranglehold of the contest going into the conclusion on Wednesday.

Mark Williams finds himself in a real fight to book his semi-final spot, though, with Yan Bingtao holding him to 8-8 overnight.

Williams looked to have the match on the end of his cue after the morning session, which he won 6-2.

However, Ningtao turned the table on the Welshman, meaning they will essentially have a best-of-nine shootout on Wednesday to decide who advances.

Elsewhere, Judd Trump build a narrow 5-3 advantage over Stuart Bingham, and John Higgins leads Jack Lisowski by the same scoreline.

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