British number one Kyle Edmund remains on course for his maiden ATP title after reaching the European Open final in Antwerp with a 6-3 6-4 win over 2016 champion Richard Gasquet.
The 23-year-old world number 15 and top seed beat Gasquet, the world number 28, in one hour 17 minutes.
Edmund will meet another Frenchman, Gael Monfils, in Sunday’s final.
Sixth seed Monfils, 32, who is now ranked 38 in the world, beat Argentina’s Diego Schwartzman 6-3 6-4.
Schwartzman, a beaten finalist in the tournament’s previous two editions, lost in one hour 17 minutes.
It ensured a French participant in the final for the third year in succession, with Jo-Wilfried Tsonga taking the title in 2017.
Edmund broke in the second game against Gasquet and quickly built a 3-0 lead in the opening set, before wrapping up his third win in four meetings.
Meanwhile, in the Kremlin Cup, Russian sixth seed and world number 14 Daria Kasatkina, who beat Britain’s Johanna Konta in the semi-finals, won the women’s title with a 2-6 7-6 (7-3) 6-4 victory over Ons Jabeur of Tunisia.
Defending champion Caroline Wozniacki begins her WTA Finals campaign against Czech Karolina Pliskova in the opening night session on Sunday.
The Danish second seed has also been drawn in the same group as Petra Kvitova and Elina Svitolina.
Wimbledon champion Angelique Kerber, top seed in Simona Halep’s absence, plays Kiki Bertens on Monday.
US Open champion Naomi Osaka and Sloane Stephens – both debutants at the season finale – complete their group.
The tournament, which also includes a doubles event, has a total prize fund of £5.36m.
Singapore is hosting the season-ending WTA Finals for the last time before the event moves to Chinese city Shenzhen next year.
No Halep or Williams – who has qualified?
World number one Halep finished top of the Race to Singapore rankings after a stellar season that saw her win a maiden Grand Slam at the French Open in June.
However, the Romanian – a beaten finalist in 2014 – withdrew from the event on Thursday because of a lower-back injury.
That means Germany’s Kerber is the top seed, ahead of Australian Open winner Wozniacki, with the pair separated in the group stage draw and unable to meet before the semi-finals.
Three other Grand Slam winners – Osaka, Kvitova and Stephens – are also among the eight contenders.
Ukraine’s Svitolina and former world number one Pliskova qualified on Wednesday following Bertens’ defeat in the second round of the Kremlin Cup in Moscow.
But the Dutch player joined them in Singapore as the beneficiary of Halep’s withdrawal.
Another big name missing is 23-time Grand Slam champion Serena Williams, who only returned midway through the season after having her first child and has not qualified.
Wozniacki, who claimed her first Grand Slam at the Australian Open in January, comes into the finals having won the China Open this month.
“All the best players are here so there’s no easy matches,” Wozniacki said.
“I’m just excited to start the competition and do my best. As defending champion I want to defend my title and end the season on a high.”
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How does the tournament work?
The finals are the culmination of the WTA season and the singles title is contested by the eight players who have accumulated the most ranking points from 52 tournaments – including the four Grand Slams – over the year.
The eight singles players are seeded in terms of points accrued and split into two groups of four in a draw, which took place on Friday.
The groups are played in a round-robin format over the course of the week, with the top two players in each qualifying for the semi-finals on Saturday.
The winners meet in the final on Sunday at 12:30 BST (19:30 local time).
British number one Johanna Konta’s season ended when she lost in the Kremlin Cup semi-finals to Russian sixth seed Daria Kasatkina in Moscow.
Konta was aiming to make her second WTA final of a difficult season but lost 6-4 6-3 in Friday’s semi-final.
After struggling for form and dropping out of the world’s top 40, the 27-year-old has been working with prospective new coach Dimitri Zavialoff in Russia.
She responded by reaching the last four and tested Kasatkina before fading.
Victories against Elise Mertens, Daria Gavrilova and Aliaksandra Sasnovich – all above 44th-ranked Konta in the world – look to have boosted the Briton’s confidence after a disappointing season which led to her splitting with coach Michael Joyce last week.
And there were further positive signs – particularly in a tight opening set – for Konta to take, despite defeat by 21-year-old Kasatkina, who is ranked 14th in the world and considered one of the brightest talents on the WTA Tour.
Konta saved four set points at 5-2 down in the opener and broke back in the next game for 5-4 – after Kasatkina had saved three break points – when the 21-year-old double faulted.
However, Konta could not build on that momentum. She lost her serve again in the next game as Kasatkina took the opener having won just one more point than her opponent.
The former Wimbledon semi-finalist made an encouraging start to the second set by breaking Kasatkina’s serve, only for the Russian to take control and move 4-1 ahead as Konta’s aggressive baseline game began to lose its effectiveness.
The Briton saved a match point at 5-2 but Kasatkina held serve in the next game to reach the Moscow final for the second successive year.
Kasatkina will face Tunisian qualifier Ons Jabeur in Saturday’s final.
Final set tie-breaks will be introduced at Wimbledon from next year, the All England Lawn Tennis Club has announced.
The decision comes after the final set between Kevin Anderson and John Isner in this year’s Wimbledon men’s semi-finals lasted almost three hours.
Afterwards, South African Anderson, who eventually won the set 26-24, called for a rethink of the format.
The AELTC said “the time had come” to introduce a tie-break method at “a reasonable point” in a deciding set.
“While we know the instances of matches extending deep into the final set are rare, we feel that a tie-break at 12-12 strikes an equitable balance between allowing players ample opportunity to complete the match to advantage, while also providing certainty that the match will reach a conclusion in an acceptable time frame,” said AELTC chairman Philip Brook.
She earned an impressive win over world number 16 Elise Mertens in the opening round and followed that by beating Daria Gavrilova in round two.
Against Sasnovich she raced into a one-set lead by winning four consecutive games from 2-2 but lost her opening service game of the second set with the Belarusian clinching it on her ninth break point of the game.
Sasnovich then comfortably levelled at one set apiece before both players failed to take break points early in the deciding set.
In the tie-break, Konta hit a fine backhand winner to move 4-2 in front and won the following three points to seal victory.