In the early morning of March 31, Beijing time, the third match of the quarter-finals of the Snooker Tour Championship began to compete, and O'Sullivan and Mark Williams, the old rivals, met in a narrow way. In the final 19 innings and 10 wins, the two fought fiercely in 19 rounds, O'Sullivan performed better in the game, he blasted a 5-shot breaker, 10-9 narrowly beat Mark Williams, successfully advanced to the final four of the tournament, and the semi-final will play Robertson.
In the first set, the two were fiercely contested, with O'Sullivan making a mistake on snooker and Mark Williams scoring the No. 5 goal to win the first set 79-51. O'Sullivan scored 56 points in the second inning to pull back the set 76-23. In the third inning, O'Sullivan continued the fiery feel, fading out of the 84-point record with a single shot to make it 91-14 to the next set. In the 4th inning, O'Sullivan scored 131 points to take a 3-1 lead in the first half of the first stage.
Williams scored a single 58 and 52 points respectively in the fifth inning to return the game with a 115-0 clean sheet. In the 6th inning, O'Sullivan scored 128 to win the set 128-14. Mark Williams again pressed in the innings 92-50 in the 7th inning, and in the 8th O'Sullivan blasted out 89 points to win the set 97-0, ending the first stage 5-3.
Mark Williams blasted out 103 points in the 9th inning, followed by O'Sullivan's 100-pointer in the 10th inning, giving O'Sullivan a 6-4 lead after the first 10 innings. Mark Williams scored 89 points in the 11th inning to win another set 102-40. In the 12th inning, O'Sullivan scored 75 points to continue his slim lead 7-5.
Williams scored a single 50 and 51 runs in the 13th and 14th innings to tie two straights before trailing to a 7-7 tie. In the 15th inning, O'Sullivan scored 106 points to win another set 112-24. Williams won 102-1 in the 16th inning, with the two sides drawing eight. In the 17th inning, O'Sullivan blasted out a one-shot 127 point to win the match point 9-8. Williams withstood the pressure in the 18th inning and dragged the match into the decider 67-57. In the decider O'Sullivan came in, beating Williams 65-44.