Ronnie O'Sullivan grimaces while holding his cueImage source, Getty Images
Image caption,

Ronnie O'Sullivan won the World Championship in 2001, 2004, 2008, 2012, 2013, 2020 and 2022

ByMichael EmonsBBC Sport journalist at the Crucible Theatre, Sheffield

Ronnie O'Sullivan began his quest for a record-breaking eighth World Championship title with a dominant opening session against Chinese debutant He Guoqiang.

O'Sullivan, 50, took the first five frames and holds a 7-2 advantage, needing only three frames for victory when the match resumes on Wednesday (14:30 BST).