Ronnie O’Sullivan suffered a damaging morning in his bid for a history-writing eighth snooker world title at the Crucible Theatre today as Zhao Xintong secured every frame in the early session in Sheffield.

Seven-time champion Ronnie O'Sullivan and first-time semi-finalist Zhao Xintong shared the spoils in a gripping opening session at the Crucible, tying 4-4 as they fought for a spot in the World Snooker Championship final.