KEY POINTS:
Qualifier Liang Wenbo became the first Chinese player to reach the quarter-finals of the snooker world championship when he came through a tense deciding frame against Joe Swail to win 13-12 in Sheffield yesterday.
Leading 9-7 at the start of the final session, the 21-year-old moved to within a frame of victory at 12-8. He then saw Swail reel off four frames in a row to level at 12-12.
The Northern Ireland player looked on course to win in the final frame before a missed brown handed victory to Wenbo. Wenbo, who is making his debut at The Crucible, will now face tournament favourite Ronnie O'Sullivan for a place in the last four.
Earlier, O'Sullivan made a maximum 147 break, a record third in world championships, on his way to beating fellow Briton Mark Williams 13-7.
