Note. This article will be updated as matches end.

INDIAN WELLS, Calif. – The WTA Finals began on Sunday and all eight competitors in singles and doubles will have played two rounds after today. The top two players in each four-player group advance to the semi-finals.

With wins in round-robin play over Marta Kostyuk and Coco Gauff, Linda Noskova became the first singles player to earn a spot in the semi-finals that will take place on Saturday. She plays Jessica Pegula Thursday in her final round-robin match.

With two-set losses to Pegula and Noskova, Marta Kostyuk is eliminated from the semifinals.

This tennis tournament is one of the few where every player faces the other players in their group of four. A player can lose two of three round-robin matches and still advance. Eight times, a player who went 1-2 in the round robin has gone on to win the title.

The top two players in each group move on to the semifinals, based on wins. If two players are tied for second, the head-to-head result decides it. If three are tied, the tiebreakers are percentage of sets won, then percentage of games won. Read more about who made it in this year.

(6) Elina Svitolina (Ukraine) d. (7) Karolina Muchova (Czechia), 3-6, 6-2, 6-2 (Wednesday)
Svitolina came back from one set down to defeat Muchova, exacting revenge on a 3-set seminfinal loss in Stuttgart, Germany where Muchova won, 6-4, 2-6, 6-4. With the win, Svitolina moves to 4-1 in head-to-head competition.

“I feel she she played she played well the first set,” said Svitolina. “Tactically, I think I didn't execute as well. … I think I was striking the ball better today in the second and third set than in Stuttgart, because then you know in Stuttgart I think I missed my opportunity, and she just took over.

(3) Mirra Andreeva d. (2) Aryna Sabalenka, 6-4, 6-0 (Wednesday)

Down a break, 4-1, in the first set, Andreeva ripped off 11 straight games to make the statement win of the tournament. In an on-court post-match interview, Andreeva gave her coach Conchita Martinez “eighty-two percent of the credit” for the victory.

Andreeva faced no break points in set 2, and across the match had 16 winners to just six unforced errors, and five aces to zero for Sabalenka.

(1) Gabriela Dabrowski (Canada) & Luisa Stefani (Brazil) d. (3) Hanyu Guo (China) & Kristina Mladenovic (France), 7-6 (5), 4-6, 10-5 (3rd set is a 10-point tiebreaker)

(5) Su-Wei Hsieh (Chinese Taipei) & Jelena Ostapenko (Latvia) d. (7) Elise Mertens (Belgium) & Shuai Zhang (China), 7-5, 6-3

Jessica Pegula d. Marta Kostyuk, 6-2, 7-5 (Tuesday)
Kostyuk had a slow start with four double faults in the first set. She came back in the second set to go up 4-2, but Pegula broke back to stay in the set, eventually winning it, 7-5.

“I felt like I I served better today than I have,” said Pegula. “She's such a good returner. She puts so much pressure on the return that I think that's one of the best things she does. So I think I've been working a lot on on serving against the girls who who return very aggressively. … I don't think maybe she was serving her best today, but I was able to take advantage of that.”

Linda Noskova d. Coco Gauff, 6-3 6-3 (Tuesday)

Noskova’s serve and strong return game made the difference in the match. After winning the first set 6-3, Noskova was up a break in the second set, 4-1, when Gauff appeared to be mounting a comeback. She won her service game at love, and then won the next two points on Noskova’s service game. Noskova dug in, hitting two aces and a winner to go up 40-30, then won the game on Gauff’s unforced error.

“I did not play those first two [points] on my serve very well, so that was my fault,” said Noskova. “I had to kind of reload, restart, because I knew that if I would lose this advantage that I … built for myself in the second set, finishing the set would be very tough, especially with her. So I had to pull out some aces, which helped me. It's always, you know, a part of my game … so it helped me at a crucial point.”

”She served well, and I think I started off the match not serving so well, so didn't really put a lot of pressure on her on those games,” said Gauff.

Group 1 Round 2 Matches

Katerina Siniakova/Taylor Townsend d. Ellen Perez/ Demi Schuurs, 7-6(2) 6-3 (Tuesday)

Sara Errani & Jasmine Paolini d. Cristina Bucsa & Nicole Melichar-Martinez, 3-6 6-2 10-7 (Tuesday)

Coco Gauff d. Jessica Pegula, 6-4, 6-7 (5), 6-2 (Sunday)
Gauff won the first set, saving four break points. Pegula saved four of five and that made the difference in the set. In the second, Pegula jumped to a 5-1 lead before Gauff came back to go up 6-5 with a match point. Pegula pulled out the set in a tiebreaker before losing the third, getting broken three times to Gauff’s one.

Linda Noskova d. Marta Kostyuk, 6-2, 6-2 (Sunday)
Kostyuk struggled with her serve, especially in the first set, when only about one quarter of her first serves (27%) went in, and that cost her. In the second set, Noskova won her only break-point opportunity. Kostyuk’s serving improved and she had more winners than Noskova (11-10), but she couldn’t convert on either of her break-point chances.

Aryna Sabalenka d. Karolina Muchova 7-6 (2), 7-5 (Monday)
Muchova, playing in the WTA Finals for the first time, had similar stats to Sabalenka but couldn’t get over the finish line in either set. In the second set, Sabalenka won the big points, breaking Muchova’s serve three times. Muchova broke Sabalenka twice.

“You don't get an easy match here, so this is like the first first match, and you play the world number two, so you don't have that time to get in a match or … grow your game, so .. right away [you] have to play your best tennis,” said Muchova. “But I'm happy. I got this match now under the belt.”

Mirra Andreeva d. Elina Svitolina 6-4, 6-0 (Monday)
Finals newcomer Andreeva continued to get stronger as the much progressed. She was never broken and won seven straight games to close out the match.

“I think actually because I was nervous, maybe the nerves helped me to try and be more consistent in a way, like I didn't try to go for some crazy shots or didn't try to play risky,” said Andreeva. “I feel like in a way that helped me.”

Gabriela Dabrowski/Luisa Stefani d. Elise Mertens/Zhang Shuai 6-3, 7-6 (5)

Hanyu Guo /Kristina Mladenovic d. Su-Wei Hsieh/Jelena Ostapenko, 3-6, 6-1, 12-10

Sara Errani/Jasmine Paolini d. Katerina Siniakova/Taylor Townsend, 4-6, 6-1, 10-8

Cristina Bucsa/Nicole Melichar-Martinez d. Ellen Perez/Demi Schuurs, 6-0, 6-4