Aryna Sabalenka kept her hopes of progressing to last four of the WTA Finals alive with a straight-sets win over Jessica Pegula.

Sabalenka claimed her second win in three matches with a 6-3 7-5 triumph against her American opponent in Fort Worth, Texas. 

Having dominated the opening set, Sabalenka twice failed to consolidate a break of serve in the second.

However, she struck for a third and final time to claim a win that means she will go through in second place in Group Nancy Richey if Maria Sakkari, who is already through, wins a set against Ons Jabeur in the final round-robin match. Pegula exits having lost all three of her matches.

"I’m just happy that I was really focused from the beginning to the end and I was able to finish this match in two sets," Sabalenka said afterwards.

Sabalenka struck 31 winners en route to victory, hitting at least 30 for the 16th match this season.

Only Caroline Garcia (18) and Elena Rybakina (17) have had more such matches on the WTA Tour in 2022, indicating that, if Sabalenka does go through, she has the firepower to threaten to claim the trophy.

BREAK POINTS WON

Sabalenka - 6/12

Pegula - 3/5

ACES/DOUBLE FAULTS

Swiatek - 1/3

Kasatkina - 1/1

Maria Sakkari is yet to lose a set through two WTA Finals games, defeating Aryna Sabalenka 6-2 6-4 on Wednesday to advance through the Nancy Richey Group into the final-four.

The first set was relatively smooth sailing for the Greek, taking advantage of Sabalenka's errors to break twice.

Belarus' Sabalenka did create some chances herself, with two break opportunities compared to Sakkari's four, but could not take either. She also committed the only two double faults of the opening frame, and had 13 unforced errors with her seven winners, while Sakkari had an even four unforced errors and four winners.

The second set was more of the same, with Sabalenka committing 16 unforced errors with only eight winners as Sakkari collected an early double-break to go up 3-0, seemingly coasting to victory.

But Sabalenka fought back, winning the next four games in a row to briefly take the lead in the set. Unfortunately for her, the see-sawing contest saw Sakkari rattle off the next three games to close out the win.

Sabalenka is still a chance to advance to the next round after defeating Ons Jabeur in her opening fixture.

WINNERS/UNFORCED ERRORS

Sakkari - 15/16

Sabalenka - 15/29

ACES/DOUBLE FAULTS

Sakkari - 1/1

Sabalenka - 0/4

BREAK POINTS WON

Sakkari - 5/7

Sabalenka - 2/7

Aryna Sabalenka fought from a set behind to come back and defeat Ons Jabeur 3-6 7-6 (7-5) 7-5 in their first match of the WTA Finals on Monday.

Sabalenka, 24, has now won her past three matches against Jabeur, and this time around it was her ability to limit the effectiveness of the Tunisian's serve that turned the tide.

Jabeur's serve dominated the opening set, winning 73 per cent (16-of-22) of her service points while not allowing Sabalenka a single break point opportunity.

The second set was a different story, as some double faults crept into Jabeur's game and her success rate on her service points dipped to 51 per cent (24-of-47), allowing Sabalenka to break three times before forcing a decider with a close tiebreaker.

Sabalenka finally got on top in the third set, narrowly edging the total points count 37 to 31 in the frame while converting both of her break point chances to finish off the victory.

She now sits second in the Group B standings, trailing Maria Sakkari due to the Greek winning her match in straight sets.

BREAK POINTS WON

Sabalenka - 5/8

Jabeur - 6/10

WINNERS/UNFORCED ERRORS

Sabalenka - 21/26

Jabeur - 37/29

ACES/DOUBLE FAULTS

Sabalenka - 1/6

Jabeur - 7/5

There will be one racing certainty when the WTA Finals gets under way: a new champion will be crowned.

Iga Swiatek heads the list of contenders to carry off the trophy in Fort Worth, Texas, having enjoyed a spectacular season.

Ascendant Americans Jessica Pegula and Coco Gauff will be chasing a home victory, while Tunisia's Ons Jabeur has reached finals at Wimbledon and the US Open so loves the big occasion.

Ahead of the tournament getting under way on Monday, Stats Perform has taken a look at the eight-player field.

Swiatek still the player to beat

With no past winner in the line-up, there is every reason to look to the world number one, Swiatek, as favourite.

The 21-year-old Polish player has eight titles this year, lifting trophies at Doha, Indian Wells, Miami, Stuttgart, Rome, the French Open, the US Open and San Diego.

Indeed, she is the only grand slam singles winner in the draw, with Ash Barty having retired and Elena Rybakina absent after no ranking or race points were awarded at Wimbledon, where she was a surprise champion.

Rybakina's absence calls into question the meritocracy of this year's tournament, which is intended to showcase the top performers on tour, yet there can be no doubt the season's premier performer is in the draw.

French Open and US Open winner Swiatek's remarkable run of 10 straight-sets victories in finals (dating back to the 2020 French Open) was finally ended by Barbora Krejcikova, who sprang a shock by winning in Ostrava in early October.

But by getting back to winning ways a week later in San Diego, scrapping for a three-set victory over Donna Vekic in the title match, Swiatek produced a typically impressive response, beating Qinwen Zheng, Gauff and Pegula on her way through the draw to improve to 64-8 in her win-loss record for the year.

Here is a measure of her dominance this season: Swiatek headed the 'Race to the WTA Finals' rankings with 10,335 points, with the players in second (Jabeur) to eighth place (Daria Kasatkina) having tallies ranging between 4,555 and 2,935 points.

Is Pegula the chief rival to Swiatek?

She might not have been the player that would have sprung to mind even a month ago, but Pegula's victory at the Guadalajara Open this month was an eye-opener.

Beginning by saving match points in a thrilling three-setter against Rybakina, Pegula took down grand slam winners Bianca Andreescu, Sloane Stephens and Victoria Azarenka before swatting aside Maria Sakkari in the final.

Pegula has reached quarter-finals at the Australian, French and US Opens in 2022, and she has a tour-high 39 wins in WTA 1000 events since the beginning of last year.

She is up to third in the WTA rankings, one ahead of Coco Gauff, with the United States now having two women in the top five for the first time since October 2010, when Serena Williams was number two and sister Venus sat fourth.

As Pegula said after the Guadalajara final: "I'm definitely a very ambitious person. A little bit of a perfectionist, as well. I don't think you could win if you weren't ambitious, especially at this level.

"I feel like it's going to give me more motivation going forward knowing I can win these big titles. I think it will give me a lot of confidence ending the year, going into next year."

These are spirited words. She heads into the tournament with a 0-4 record against Swiatek in 2022, however.

Who's in, who's out, what's it all about?

As well as Swiatek and Pegula, the field for the eight-day tournament includes Caroline Garcia, Aryna Sabalenka and Sakkari, who have all featured at the WTA Finals in the past.

Four players make their debuts, including Pegula, who is joined as a newcomer by Jabeur, Gauff and Daria Kasatkina.

Gauff, 18, has become the 14th player aged under 19 to reach the WTA top five since the rankings were introduced in 1975.

She would not be the youngest WTA Finals champion, were she to lift the title, as Monica Seles has a tight grip on that record, having triumphed at the age of 16 years and 11 months at the 1990 edition.

Last year's champion Garbine Muguruza is absent. The Spaniard was expected by many to push on and enjoy a stellar 2022 season, but it did not play out that way, with the former French Open and Wimbledon winner sliding to 57th in the world rankings after a dismal campaign.

It goes to show that whoever prevails in Fort Worth, we should be cautious about treating the outcome as an indication of what to expect in the new year.

World number one Iga Swiatek thrashed Coco Gauff to clinch a third straight WTA Tour semi-finals berth after moving into the San Diego Open final four on Friday.

Swiatek was irrepressible against the 18-year-old American, extending her head-to-head dominance to 4-0 with a 6-0 6-3 victory in 66 minutes.

The Pole won the first eight games of the match and always appeared in control with her reliable forehand a key feature.

Swiatek laced 13 winners with only nine unforced errors, breaking Gauff five times. The American committed 26 unforced errors for the match.

The victory is Swiatek's 62nd of the season, moving her closer to Angelique Kerber's 2016 mark of 63.

Swiatek will face fourth seed Jessica Pegula in the semi-finals as the Pole aims for her eighth WTA title of the season.

Pegula secured her berth in the final four with a 6-4 7-5 victory over compatriot Madison Keys in their first-ever meeting in one hour and 34 minutes.

Third seed Aryna Sabalenka was a surprise casualty as Croatian qualifier Donna Vekic continued her excellent week with a 6-4 6-7 (5-7) 6-1 in two hours and 37 minutes.

World number 77 Vekic has beaten former world number three Maria Sakkari and two-time major finalist Karolina Pliskova this week.

Second seed Paula Badosa was also bundled out by American Danielle Collins 7-6 (7-5) 6-4. Collins will meet Vekic in the last four.

World number one Iga Swiatek commenced her San Diego Open campaign with a hard-fought three-set victory over Chinese lucky loser Zheng Qinwen in rainy conditions on Thursday.

The 2022 French Open and US Open champion triumphed 6-4 4-6 6-1 in two hours and two minutes, bouncing back strongly after losing the second set.

Zheng's power and forehand top spin proved challenging for the Pole, who was solid from the baseline to secure her 11st tour quarter-finals appearance this season.

The Chinese had broken Swiatek to lead 1-0 in the third set, but the top seed responded in trademark style, improving her record in the United States this season to 21-1.

Swiatek will take on eighth seed Coco Gauff in the quarter-finals, with the match-up marking a re-match of this year's French Open final.

Gauff worked her way into the last eight with a 6-4 4-6 6-3 victory over 2019 US Open champion Bianca Andreescu.

The 18-year-old American also had to fight back from a set down in the third set to win in a match that lasted just over two-and-a-half hours.

Third seed Aryna Sabalenka fought back from a lopsided opening set to knock out American Sloane Stephens 1-6 6-3 6-2 in two hours and one minute. The Belarussian will take on Donna Vekic in the next round.

Second seed Paula Badosa eased into the last eight, winning in 53 minutes against American qualifier Louisa Chirico 6-0 6-3. Badosa will face Danielle Collins in the quarter-finals.

Madison Keys triumphed over eighth seed Daria Kasatkina 6-4 6-3 in one hour and 27 minutes to secure a quarter-final date with fourth seed Jessica Pegula.

Iga Swiatek is relishing what she expects to be "a great battle" with Ons Jabeur in the US Open final.

The world number one came from behind to defeat Aryna Sabalenka 3-6 6-1 6-4 in Thursday's semi-final to set up a shot at a third grand slam title.

Swiatek will now face Tunisia's Jabeur, who is yet to win a major and suffered defeat in this year's Wimbledon final.

Asked about the task of taking on the world number five in Saturday's showpiece, Swiatek said: "There are a lot of challenges because she's a really solid player and she's second in the race right now.

"You know, Wimbledon final. She didn't get [ranking] points for that, but it shows how much progress she has made.

"She has a different game style than most of the players. She has a great touch. All these things mixed up... she's just a tough opponent.

"That's why probably our matches are always kind of physical and really tight.

"She's just a tough opponent and fully deserves to be in the final. I think it's going to be a great battle."

The Pole conceded she was still lacking trust in her ability on hard courts, with clay her favoured surface, as evidenced by two French Open titles.

But she is delighted to have overcome that in order to push on to a maiden final at Flushing Meadows.

"I just feel like the work that I did pays off," she said. "I feel like even though I lost in Toronto and Cincinnati pretty early, it gives you a chance to prepare and you have to be ready during that time to actually use that.

"I'm pretty happy that on this tournament I was fresh mentally to actually use the chances. I'm pretty happy that even though maybe I wasn't feeling 100 per cent perfectly from the beginning of the tournament, I was still able to get better and better and to play a really solid game."

From her past 50 matches, Swiatek has a record of 46-4, and coming into this tournament she had 8605 ranking points – with second-placed Anett Kontaveit down at 4360.

She is also the first number one seed to reach the US Open final since Serena Williams did it back in 2014, snapping the equal-longest drought on that front at any grand slam in the Open Era.

Iga Swiatek will have a chance to win her third career grand slam after defeating Aryna Sabalenka 3-6 6-1 6-4 in a gutsy come-from-behind win in Thursday's semi-final.

Poland's Swiatek, who has also won the French Open in 2020 and 2022, will play Ons Jabeur in the decider after the Tunisian won her semi-final against the in-form Caroline Garcia in straight sets earlier on.

It continues a remarkable season for the 21-year-old Swiatek, having also reached the semi-final at the Australian Open, before rattling off a 37-match winning streak that saw her claim six titles in a row and put a massive gap on the field as the world number one.

Belarus' Sabalenka was impressive in the opening set, attacking Swiatek's second serves to generate plenty of break points. She won 10-of-12 opportunities against Swiatek's second serve in the first frame, creating six break point chances and taking three.

Things flipped in the second set, and it was all about Swiatek making the adjustments, increasing her first serve accuracy from 64 per cent in the opener to 94 per cent in the second. 

She won 14-of-17 points in those situations in the second frame, and converted all three of her break point opportunities as Sabalenka got sloppy, committing 15 unforced errors with only six winners.

Sabalenka threatened to run away with things late – twice managing to go up a break in the third set – but Swiatek showed composure beyond her years as she continued to fight back.

From 4-2 down in the decider, Swiatek rattled off the next four games in a row, going up 40-0 against Sabalenka's serve in the final game and finishing things off with her second match point.

Data Slam: Swiatek continues historic season

From her past 50 matches, Swiatek has a record of 46-4, and coming into this tournament she had 8605 ranking points – with second-placed Anett Kontaveit down at 4360.

She is also the first number one seed to reach the US Open final since Serena Williams did it back in 2014, snapping the equal-longest drought at any grand slam in the Open Era.

ACES/DOUBLE FAULTS

Swiatek – 2/3

Sabalenka – 4/7

WINNERS/UNFORCED ERRORS

Swiatek – 24/31

Sabalenka – 22/44

BREAK POINTS WON

Swiatek – 7/10

Sabalenka – 5/10

Aryna Sabalenka credited a greater awareness of what to expect from Karolina Pliskova for her US Open quarter-final victory.

Sabalenka and Pliskova went into Wednesday's match having split their four previous meetings.

Pliskova, though, had the last two, the Czech coming from a set down to beat Sabalenka in last year's Wimbledon semi-finals and also prevailing in the last four in Montreal in 2021.

But Sabalenka turned the tide this time around at Flushing Meadows, a blistering forehand return sealing a 6-1 7-6 (7-4) triumph and a place in a second successive US Open semi-final.

Sabalenka said in her on-court interview: "The last two matches, I don't want to say I didn't respect her and I didn't expect from her a great level, I was thinking ok I'm on the top I have to beat her and today I expect a great level, I expect the long rallies, I expect the tough match and I just tried to stay in this match as long as I can and just tried to make her work for it and should played really well and somehow I was able to handle this level and win this match."

Next up for Sabalenka will be either world number one Iga Swiatek or home hope Jessica Pegula.

And she knows either opponent will present a significant hurdle as Sabalenka seeks to reach a first grand slam final.

"It's a semi-final, it's going to be tough and I'm ready for it, I'm ready for another fight," she added. 

"I think I just have to stay focused on myself and do whatever I can, do my best and be ready for a great battle."

Aryna Sabalenka believes she is ready for the challenge of Karolina Pliskova in the quarter-finals after losing both of their meetings in 2021, saying she knows what to expect this time around.

Sabalenka defeated Danielle Collins 3-6 6-3 6-2 on Monday, with the world number six coming from a set behind to collect her seventh win from her past eight matches.

With Pliskova getting the better of Sabalenka's Belarusian compatriot Victoria Azarenka 7-5 6-7 (5-7) 6-2, it sets up the fifth career meeting between the pair, with their head-to-head record split at two wins apiece.

Sabalenka won both meetings in 2018, but after years without a match against each other, Pliskova flipped the script in 2021 with wins in Montreal and at Wimbledon.

Speaking to the media after her fourth round win, Sabalenka said she was caught by surprise at how much Pliskova had improved in the years between their matches, and how that will not be the case this time around.

"To be honest, on those matches, the first matches I won against her, I was an upcoming player," she said. "I was lower in the ranking, I was respecting every top player. I was kind of expecting a great level from them.

"Then, in the last two matches last year, I was in the top. Every time she was making me move, every time she was making winners, I was like, what's going on? How is it possible? Oh, my God, she is making winners.

"I want to say that I wasn't kind of really respecting her. Right now I really expect great level from her. 

"It's going to be tough. Every time she will make some winners, it's not going to be pissing me off, it's going to be like, okay, it's normal, she's making it, what next?"

Meanwhile, Pliskova believes she is playing her best tennis of the season at the moment after advancing to the quarter-finals for the second straight year, having lost to Maria Sakkari at Flushing Meadows in 2021.

She told the media after defeating Azarenka that it may have been her best performance of the year – and maybe even longer.

"I think this was one of the best matches this year, from my side," she said. "I think also from her. I thought the level of the tennis was quite good for all three sets.

"Maybe in the third set, maybe she started to drop it a little bit. Of course, it was understandable because physically it was also quite tough. We had long rallies, long points, long games.

"But quite happy with my level. I think I'm playing quite good tennis now, maybe even better than last year here."

Ekaterina Alexandrova beat top seed Aryna Sabalenka in straight sets in The Rosmalen Grass Court Championship final on Sunday to claim her second career title. 

The world number 30 prevailed 7-5 6-0 against a below-par Sabalenka in just 77 minutes to add to her Shenzhen Open triumph from January 2020.

Sabalenka was seeking an 11th singles title and looked value to do so after cruising into the final in 's-Hertogenbosch, but she was outclassed by Alexandrova.

The pair had dropped just one set apiece in their four matches en route to the final, which went the way of the serve until the sixth game when Sabalenka broke her opponent.

However, she was unable to build on that advantage as Alexandrova hit back in the following game and broke the Belarusian again in the 11th to serve out the opener.

In the first meeting between the pair on grass, Alexandrova completely dominated the second set as she broke all three of Sabalenka's service games in a ruthless showing.

The 27-year-old, who had lost two of her previous three finals, took her second match point to complete the job in a stress-free manner.

Aryna Sabalenka will meet Ekaterina Alexandrova in The Rosmalen Grass Court Championship final, while Beatriz Haddad Maia set up a showdown with Alison Riske in the Nottingham Open showpiece.

Sabalenka, ranked sixth in the world, put paid to Shelby Rogers 7-6 (8-6) 6-0, as the favourite in the Netherlands reached her second singles final this year.

World number 30 Alexandrova had little difficulty against Veronika Kudermetova as she triumphed 6-3 6-1 to reach her first singles final of the season.

Sabalenka and Alexandrova have split four previous meetings with two wins apiece, with the latter taking the most recent clash in straight sets at the Moscow quarter-finals last year.

Seventh seed Haddad Maia stunned favourite Maria Sakkari in the quarter-finals to tee up the last-four clash with Tereza Martincova in Nottingham.

The Brazilian raced out the blocks once more to progress past Martincova, with the former 6-3 4-1 up before the Czech retired with injury.

Rain stopped play in the second semi-final between Viktorija Golubic and Riske with the scores level at one set each.

Sixth seed Riske capitalised from that point onwards to edge past Golubic 6-3 4-6 6-3.

Top seed Maria Sakkari was eliminated from the Nottingham Open at the quarter-final stage by world number 48 Beatriz Haddad Maia on Friday.

Haddad Maia made it three career wins out of three against Sakkari with a 6-4 4-6 6-3 victory to reach her first WTA semi-final on grass.

The Brazilian will now take on Tereza Martincova, who beat last year's runner-up Zhang Shuai 6-3 6-2, for a place in Sunday's final.

Sixth seed Alison Riske is also through to the last four after recovering from a set down to beat home favourite Harriet Dart 4-6 6-2 6-1.

Riske's sixth career semi-final on grass will come against Viktorija Golubic, who surprised Ajla Tomljanovic 6-3 7-6 (8-6) in the final match of the day.

At The Rosmalen Grass Court Championships, second seed Belinda Bencic's participation was ended with a straight-sets defeat to Veronika Kudermetova.

French Open quarter-finalist Kudermetova prevailed 6-4 6-2 in 87 minutes to snap a three-match losing streak against Bencic.

Russian compatriot Ekaterina Alexandrova is up next in the semi-finals after easing past American qualifier Caty McNally 6-0 6-1

Top seed Aryna Sabalenka is into her third semi-final in her past five tournaments, meanwhile, thanks to a 6-2 3-6 7-6 (7-5) win over Alison Van Uytvanck.

Shelby Rogers, a 3-6 6-1 6-4 winner against Kirsten Flipkens, awaits Sabalenka in Saturday's semi-final.

Elena Rybakina and Tamara Zidansek were both surprise second-round losers at The Rosmalen Grass Court Championships as numerous top seeds fell on Thursday.

Third favourite Rybakina struggled to find her rhythm and fell to a 6-2 6-4 loss against world number 42 Shelby Rogers.

The American will face Kirsten Flipkens in the quarter-finals in the Netherlands after she eased past Ann Li in straight sets.

Aryna Sabalenka, the favourite at the tournament, had little difficulty in negotiating past Arianne Hartono 6-2 6-3 and she will meet Alison van Uytvanck in the next round.

The Belgian picked up the scalp of compatriot Elise Mertens, the eighth seed, with a 6-2 6-3 win over the world number 29.

Fourth seed Zidansek was another to fall as she suffered a 6-1 6-1 loss to Catherine McNally, while Veronika Kudermetova profited from Anna Blinkova retiring with the match heading for one set each.

Belinda Bencic, the second favourite, will next challenge Kudermetova after she bucked the trend of the day with a battling 7-6 (7-2) 6-4 win over Anna Kalinskaya.

Seventh seed Ekaterina Alexandrova had no trouble in advancing, meanwhile, as she saw off Anhelina Kalinina 6-4 6-2.

Maria Sakkari found herself 1-0 down against world number 109 Rebecca Marino before rain stopped play at the Nottingham Open, but the top seed responded to claim a 1-6 6-3 6-3 win.

Third seed Camila Giorgi had no such luck against Hannah Dart as she was eliminated 5-7 6-4 7-6 (7-3), while Alison Riske and Ajla Tomljanovic beat Caroline Garcia and Katie Boulter respectively in straight sets.