There are two ways to look at Ronnie O’Sullivan’s stumble into the semi-finals of the World Snooker Championship.

The seven-time champion twice saw his 22-year-old opponent pull back to within two frames before securing his 14th appearance in the last four.

Ronnie O’Sullivan holds off Si Jiahui as Judd Trump surges into semi-final meeting with Mark Williams - The Rocket held off a brief fightback from his opponent to set up an encounter with Zhao Xintong