Ding Junhui shocks O'Sullivan to reach semis at snooker worlds

Ronnie O'Sullivan, right, congratulates Ding Junhui after being defeated by Ding during their quarterfinal match at the the World Snooker Championship in Sheffield, England, April 27, 2017. [Photo/Xinhua]

SHEFFIELD, England - China's world number four Ding Junhui shocked five-time champion Ronnie O'Sullivan 13-10 to reach the semifinals of the World Snooker Championship on Wednesday.

Ding, last year's runner-up, built a 10-6 lead after two sessions on Tuesday but O'Sullivan won three of the first four frames in the final session, including a run of 146 in the 20th frame.

The Chinese star made an 87 to pull ahead 12-9 in the best-of-25 frames quarterfinal before O'Sullivan responded.

Ding, competing in his 11th world championship, gave no chance to the Rockets by killing off with a 117.