Ronnie O'Sullivan is through to the semi-finals of the World Snooker Championship for a 14th time, holding his nerve to defeat China's Si Jiahui 13-9 in Sheffield. O'Sullivan will face another Chinese player in Zhao Xintong for a place in the final, with the latter defeating England's Chris Wakelin in their quarter-final. The Rocket is seeking to move past Stephen Hendry's total of seven World Championship successes. More to follow.... This is a breaking news story that is being updated and more details will be published shortly. Please refresh this page for the latest updates. Sky Sports brings you live updates as they happen. Get breaking sports news, analysis, exclusive interviews, replays and highlights. Sky Sports is your trusted source for breaking sports news headlines and live updates. Watch live coverage of your favourite sports: Football, F1, Boxing, Cricket, Golf, Tennis, Rugby League, Rugby Union, NFL, Darts, Netball and get the latest transfers news, results, scores and more. Visit skysports.com or the Sky Sports App for all the breaking sports news headlines. You can receive push notifications from the Sky Sports app for the latest news from your favourite sports and you can also follow @SkySportsNews on Twitter to get the latest updates. World Snooker Championship: Quarter-finals John Higgins (3) 12-13 Mark Williams (6) Zhao Xintong 13-5 Chris Wakelin 13-5 Chris Wakelin Luca Brecel (7) 8-13 Judd Trump (2) Ronnie O'Sullivan (5) 13-9 Si Jiahui (13) Semi-finals Thursday May 1 Schedule TBC Friday May 2 Schedule TBC Saturday May 3 Schedule TBC Final Sunday May 4 13:00-18:00 19:00-22:00 Monday May 5 13:00-16:00 19:00-22:00