Mark Allen recovered from losing the opening frame to beat Jimmy White 4-1 in the first group semi-final at the Champion of Champions event in Bolton.
White won a scrappy first but a break of 76 drew Allen level, then a run of 84 edged the Northern Irishman ahead.
As in frame three, Allen came from behind to win the fourth, before a 108 break saw him clinch victory.
Ali Carter beat Mark Selby 4-3 in the second Group Four semi-final and will face Allen in Monday night’s final.
A break of 68 helped world number 10 Carter win frame one, but four-time world champion Selby fought back to take the next two, including compiling a 97 in the third frame.
A run of 76 saw Carter draw level, before an 87 helped Selby move in front again in the contest.
Breaks of 121 and 58 in the final two frames proved enough to get the 2023 German Masters champion over the line.
World number four Allen has struggled to find his best form so far this season, with his best result to date being a quarter-final appearance at the Wuhan Open.
The 37-year-old won the Champion of Champions in 2020 and qualified for this year’s tournament thanks to successes in the Northern Ireland Open, UK Championship and World Grand Prix last season.
Six-time World Championship runner-up White, 61, secured his passage to compete in the invitation event as a result of securing his fourth World Seniors Championship title earlier this year.
A field of 16 players is contesting the Champion of Champions, including Ronnie O’Sullivan, who won the title and the £150,000 first prize 12 months ago.
The winner of Monday’s Group Four final between Allen and Carter will face the victor of Group One, which includes O’Sullivan and Higgins, in the semi-finals on Saturday.
