BBC Sport journalist at the Crucible Theatre, Sheffield
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Updated 18 minutes ago
Ronnie O'Sullivan booked his place in the World Championship semi-finals with a 13-9 win over Si Jiahui as he maintained his bid for a record eighth title in the modern era.
Leading 10-6 from Wednesday morning's session, the 49-year-old Englishman lost three of the first four frames in the evening as Si closed to 11-9.
However, a sublime long red paved the way for him to win a tight 23rd frame and he completed his victory with a break of 74.