Preview WTA Finals Day One | Coco Gauff and Jessica Pegula renew rivalry as Noskova faces unexpected Kostyuk test

Sunday, 08 November 2026 at 10:52

The 2026 WTA Finals begin on Sunday at Indian Wells, with two singles matches opening the round-robin stage in Group 1. The first day was already set to feature an intriguing meeting between Linda Noskova and Elena Rybakina, but the defending champion's withdrawal has dramatically changed the opening matchup. Marta Kostyuk will now take her place, setting up a different challenge for the Czech.

The Ukrainian's late inclusion adds another layer of uncertainty to a group that also contains Coco Gauff and Jessica Pegula. Kostyuk arrives as the first alternate after a strong season that included two titles and two Grand Slam semifinal appearances. However, she faces a difficult opening assignment against a player who has enjoyed an outstanding breakthrough year and will be making her WTA Finals debut.

The second singles match offers a more familiar rivalry, as Gauff and Pegula meet for the fourth consecutive year at the season-ending championships. The Americans know each other's games extremely well, having been doubles partners and teammates, while their recent meetings have produced contrasting results. Gauff won both encounters in 2026, but Pegula has previously had the upper hand at this tournament.

Both matches could have significant implications for the group standings. With only three round-robin matches available to each player, an opening victory would provide an important advantage in the race for the semifinals. The top two players in each group will advance, making every result particularly valuable.

Marta Kostyuk vs Linda Noskova: Can the late replacement disrupt the Czech's debut?

The opening singles match has changed considerably following Rybakina's withdrawal. Noskova was originally scheduled to face the world No. 1 and defending champion, but will instead take on Kostyuk, who enters the draw as the first alternate. The Ukrainian is ranked No. 10, while Noskova occupies eighth position, making this a meeting between two players who have enjoyed major breakthroughs in 2026.

Statistic	Marta Kostyuk	Linda Noskova
Ranking	No. 10	No. 8
Age	24	21
2026 record	35-12	35-15
2026 titles	2	2
Best Grand Slam result in 2026	Two semifinals	Wimbledon champion
Previous WTA Finals appearances	0	0
Head-to-head	1	2

Noskova has arguably enjoyed the biggest breakthrough of her career. The Czech won Wimbledon in 2026, adding a Grand Slam title to her collection after also claiming the Berlin Ladies Open title. She has recorded 35 victories this season and made her serve one of her biggest weapons. An especially aggressive player, Noskova looks to take the ball early and dictate rallies, consistently trying to seize the initiative from the baseline.

Kostyuk, meanwhile, has had an impressive campaign of her own. She won consecutive titles in Rouen and Madrid, putting together a 17-match winning streak on clay before reaching the semifinals at Roland Garros. She also made the last four at Wimbledon, giving her two Grand Slam semifinal appearances in the same season. Her eight victories against top-10 opponents in 2026 further demonstrate her ability to compete with the strongest players.

Marta Kostyuk applauds after her first round victory at US Open 2026.

The main concern for Kostyuk is her recent form. Since her fourth-round defeat to Noskova at the US Open, the Ukrainian has struggled to build momentum, recording just one further victory on the WTA Tour. Noskova also has not played since Beijing, but enters the tournament with a more favourable recent record against her opponent.

Their head-to-head adds another interesting dimension. Noskova leads 2-1, having won their two most recent meetings at Wimbledon and the US Open. Kostyuk's only victory came in the Madrid quarterfinals, where she dominated the deciding stages to win 7-6, 6-0. Their US Open encounter was considerably closer, with Noskova prevailing 7-5, 5-7, 6-4.

The Czech therefore has a psychological advantage, but the change of opponent could also work in Kostyuk's favour. Noskova had prepared for a different challenge against Rybakina, whose serve and baseline power would have demanded a particular tactical approach. Kostyuk offers a different kind of threat, particularly with her movement and ability to generate pace from the back of the court.

However, it remains to be seen how the Ukrainian will perform. Her last match ended in a retirement at the Ningbo Open three weeks ago. The uncertainty surrounding her participation, given that she arrived in Indian Wells as the first alternate, may also have affected her preparations. Kostyuk has had barely 24 hours since Rybakina's withdrawal was announced to prepare for her debut against the 2026 Wimbledon champion.

Coco Gauff vs Jessica Pegula: Familiar rivals meet again at the WTA Finals

The second singles match brings together two Americans who know each other exceptionally well. Gauff and Pegula have shared a doubles partnership, represented the United States together and now meet for the fourth consecutive year at the WTA Finals. Their rivalry is finely balanced, with the overall head-to-head tied at 5-5 ahead of Sunday's encounter.

Statistic	Coco Gauff	Jessica Pegula
Ranking	No. 4	No. 5
Age	22	32
2026 record	47-15	50-14
2026 titles	1	2
Best WTA Finals result	Champion (2024)	Runner-up (2023)
2025 WTA Finals result	Group stage	Semifinals
Head-to-head	5	5

Gauff enters the tournament as the reigning Cincinnati champion, having secured her only title of the 2026 season at the WTA 1000 event. Her campaign also included finals in Miami and Rome, semifinal appearances at Wimbledon and the US Open, and another consistent run among the leading players. The American has already demonstrated that she can perform on the biggest stages, having won the WTA Finals in 2024.

Pegula has put together a more prolific season in terms of titles, lifting trophies in Dubai and Charleston while recording 50 victories. She also reached the semifinals of last year's WTA Finals and previously finished runner-up in 2023. However, she has an overall 6-8 win-loss record across her four appearances at the tournament.

The recent head-to-head, however, favours Gauff. She defeated Pegula in the Wimbledon quarterfinals before beating her again in the Cincinnati final, winning both matches in 2026. Their Wimbledon encounter was particularly competitive, with Gauff recovering after losing the opening set to win 4-6, 6-3, 6-3. In Cincinnati, she was more dominant, securing a 6-2, 6-4 victory.

There is also a notable history between them at this tournament. Pegula won their group-stage meeting in 2025, prevailing in three sets, and holds a 2-1 advantage across their previous three WTA Finals encounters. That record gives her reason to believe she can reverse the recent trend, even if Gauff arrives with the momentum of two consecutive victories over her compatriot.

Tactically, the matchup will likely depend on who can impose their preferred patterns. Pegula is one of the most consistent players from the baseline and will look to use her depth and precision to prevent Gauff from taking control of rallies.

The 22-year-old, meanwhile, possesses greater defensive range and athleticism, and can turn points around even when pushed wide. Her ability to transition from defence to attack could be decisive, particularly if she manages to exploit shorter balls and move forward to finish points.

Considering the venue, it is worth looking at both players' records at the Indian Wells WTA 1000 event. Despite being the local favourites, neither American has progressed beyond the quarter-finals at Tennis Paradise. It should make for an interesting opening encounter, particularly given their extensive experience at the tournament compared to their Group 1 opponents, Noskova and Kostyuk.

With Rybakina no longer in the group, the Americans could make their experience one of their biggest assets. Given the round-robin format, which not every player is equally familiar with, Gauff and Pegula are two names who would not surprise anyone if they advanced to the semifinals.

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The mental aspect will also be important. With so many previous meetings and a close friendship outside the court, neither player is likely to find many surprises in the other's game. Gauff has acknowledged that these matchups become increasingly tactical and mental as familiarity grows, with both players looking to disrupt patterns the other already knows.

The number of sets played could also prove significant, depending on whether the winner secures the victory in straight sets or needs three. So far, seven of their 10 meetings have been decided in straight sets, suggesting that their encounters have often produced relatively clear outcomes rather than lengthy battles.

Cristhián AvilaTennis Journalist

Cristhián Ávila is a tennis journalist based in Santiago, Chile, and has been part of the TennisUpToDate team since early 2023. He covers the ATP and WTA Tours as well as all four Grand Slams, producing breaking news, match reports, analysis, and regular liveblogs from major tournaments.

His reporting combines statistical analysis with clear explanation, helping readers understand tactical developments, player form, and broader storylines across the tour. Working fluently in both Spanish and English, Cristhián collaborates with an international editorial team and contributes to comprehensive global coverage. As part of his work, he has conducted interviews and media interactions with leading figures in the sport, including Caroline Wozniacki and John McEnroe.

In his journalism, Cristhián places strong emphasis on careful sourcing, editorial accuracy, and updating articles promptly when new, verified information becomes available. His coverage is grounded in research, context, and direct engagement with professional tennis.

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