Mark Allen fought back from 4-0 down to claim a 6-5 win against Ryan Day to book a place in the last 16 at the UK Championship.
The Antrim potter was made to work hard for his win and the final frame swung back and forth before Day, needing a snooker, potted the white and conceded.
“[I’m] not buzzing at all, I'm very happy to get over the line but it was a poor performance,” said Allen.
Oliver Lines extended his impressive run in York and predicted he could go on to win the whole tournament.
The 21-year-old from Leeds followed up a second-round win against Judd Trump with a 6-0 dismantling of Jimmy Robertson.
And after guaranteeing himself career-best prize-money of at least £15,000, Lines insisted he was not finished yet.
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"I think I could win it, I'm playing well enough to win it," Lines said.
Lines revealed stablemate Trump had sent him a text message before the match with Robertson.
"Judd messaged me, saying 'You'd better not lose this game'," Lines said.
"He said if I lost this game there'd be a fine - because we're from the same management.
"Obviously he was joking, but hopefully I can push on now because I'm feeling very confident."
Lines fired in breaks of 90, 51, 67 and 72 in sealing a shot at Marco Fu in the last 16, and he is guaranteed to rise from 61st to at least 53rd in the world rankings next week.
If he keeps the run going, a debut in the top 50 beckons.
Welshman Matthew Stevens set up an appealing fourth-round clash with Ronnie O'Sullivan after a 6-2 victory against Joe Perry, and insisted the in-form 'Rocket' is beatable.
Stevens won this tournament in 2003 but will have his hands full on Wednesday against a player who has lost just one frame in three matches at the Barbican Centre so far.
O'Sullivan was described as "not human" by vanquished third-round opponent Michael Georgiou, but Stevens is having none of that talk.
Stevens said. "I've had a good run, and if I can put Ronnie under pressure, he is human after all, he does miss balls. But you need to get off to a good start against Ronnie and put him under the cosh.
"He's probably played about three hours in three matches. If I can play well there's no reason I can't win, but I'll have to be on top of my game because Ronnie's the best player in the world by far."
Stephen Maguire won a final-frame decider to edge out Dubliner Fergal O'Brien 6-5, while China's Zhang Anda knocked out Englishman Mitchell Mann 6-3.