Ronnie O'Sullivan (right) and John Higgins battle for a quarter-final place (PA) The latest clash between old rivals Ronnie O’Sullivan and John Higgins is bubbling away nicely as they battle for a quarter-final place at the World Snooker Championship . “The Rocket” looked to be closing in on the last eight when he powered into a 9-4 lead on Sunday evening, only for Higgins to peg him back as the Scot won the final three frames of the session to leave the match intriguingly poised. O’Sullivan, who had scored freely to open up that advantage, thumped the table in frustration after missing a red in the 16th frame, and must re-find his touch if he is to advance. Two members of the “Class of ‘92”, the pair have 11 world titles between them with O’Sullivan hoping to move clear of Stephen Hendry by securing an eighth Crucible crown. Can his familiar foe derail that tilt at history? The match resumes just after 1pm BST.…