Ronnie O'Sullivan had to settle for a single-frame overnight advantage as the opening session of his World Snooker Championship first-round clash against old foe Ali Carter failed to live up to its pre-match hype.
The seven-time champion, returning to the tour for the first time since dumping his cue after losing a Championship League match in January, looked to have scrapped out a 6-3 lead to take into Wednesday afternoon's scheduled conclusion.
