O'Sullivan relieved after edging through

Ronnie O’Sullivan admitted he “never felt comfortable” during a stern examination by Neil Robertson as he reached the quarter-finals of the 888.com World Championship.

’The Rocket’ got the better of a high-quality tussle with the season’s form player to win 13-10, while 2002 champion and last year’s runner-up Peter Ebdon was beaten 13-8 by young gun Mark Selby at Sheffield’s Crucible Theatre.