Mark Selby came through a 17-15 winner against Hong Kong's Marco Fu to set up a date with Ding Junhui in the Betfred World Snooker Championship final.
Selby will be contesting his third World Championship final. He lost out to John Higgins in 2007 but beat Ronnie O'Sullivan to swipe the trophy in 2014, and after squashing the prospect of an all-Asian final it will be Selby standing in the way of record-breaker Ding.
Having come through qualifying this year, after a drastic dip in form, Ding maintained his momentum with a 17-11 semi-final victory over Scottish veteran Alan McManus in which he made seven centuries, the first time that feat has been achieved at the Crucible.
When the evening session tied at 12-12, Selby found it a struggle to shake off Fu's close attention, which was perhaps no surprise given how keenly fought the contest was.
The final frame of the day's opening session between the pair had lasted a draining one hour, 16 minutes and 11 seconds. That made it the longest in tournament history.
Selby and Fu took an hour over the closing frame of the match too, ratcheting up the tension even further, before it went the way of the man hoping for a double title celebration this Bank Holiday weekend.
Fu was at the centre of a debate after he appeared to touch a red with his index finger early in the 27th frame when bridging to play a safety shot.
Referee Brendan Moore spotted nothing amiss, and Fu showed no sign of having noticed he nudged the ball.
But it was immediately spotted by commentator John Parrott, the 1991 world champion, who said on BBC Two: "That's a foul there. The red definitely moved there.
"It's not been called but that's a foul. It's his finger (that) moves the red. Referee's missed it, so has the player.
"He moves it forward, touches the red, and it's a foul. Bit surprised both of them missed it."
Six-time world champion Steve Davis found it hard to believe Fu would not have noticed he touched the ball.
"I think everybody in the world of snooker probably would suspect you could have felt that," Davis said. "There's no way of getting out of that, that you probably did feel it."
Stephen Hendry, seven times a world champion, added: "You don't want to start pointing fingers at people or anything but you know when you've touched it, you've got nerves in your finger and you know when you've touched something.
"You can only say perhaps Marco's engulfed in the situation, there's so much tension out there."
Fu insisted he had no recollection of the incident, saying: "I haven't got a clue. My coach just told me that the commentators were saying I touched a red with my finger but I didn't really feel it. I haven't got a clue which shot you're talking about. I honestly can't feel it. I think it's just when you're focused it's very tough."
Selby admitted he rode his luck in the match.
"For three sessions I was really poor," Selby said. "When Marco was in, it looked like an art, and when I was in, it looked like a scribble. I'm just happy to get through.
"There's still a long way to go yet, another two long days. It would be fantastic if I won it again but to get to the final is a fantastic achievement. Hopefully it's not stopping there."
