Ronnie O'Sullivan says he will have to improve his standard of play if he is to continue his quest for a record-equalling sixth UK Championship victory.
O'Sullivan was speaking after edging past Sonny Akani 6-5 to set up a quarter-final meeting with fellow Englishman Martin Gould.
I will be lucky to get a couple of frames on Friday if I play like that.Ronnie O'Sullivan
The Rocket needed to win the final two frames in York to keep his campaign alive and admitted afterwards that he had been fortunate to escape a defeat to the rising Thai star.
He told World Snooker: "I felt a bit sorry for him. He deserved to win and I felt like I robbed him of a victory.
"He was unfortunate, but that's the way snooker goes sometime. I will be lucky to get a couple of frames on Friday if I play like that. If Martin beats me, fair play."
O'Sullivan can be backed at 1/6 to defeat Gould, who is priced at 4/1, while The Rocket is 1/3 to go all the way and win the UK Championship again.
The Englishman currently has five UK titles to his name, level with Stephen Hendry, with Steve Davis top of the pile with six victories.
The other quarter-finals at the Barbican see 2008 champion Shaun Murphy take on Mark King, while Ryan Day faces Mark Joyce and 2004 winner Stephen Maguire meets Joe Perry.
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