Ningbo: Alexandrova advances as Kostyuk retires at 6-4

Ekaterina Alexandrova is into the quarterfinals of the Ningbo Open, a WTA 500 on Chinese hard courts, but she got there without having to finish the match. In the round of 16 on Wednesday, October 21, the Russian won the first set 6-4 against world No. 10 Marta Kostyuk, and the Ukrainian retired. On the draw sheets the score stands at 6-4 ret.

According to the Associated Press, the retirement came after a medical timeout. Kostyuk therefore had no chance to fight back, and Alexandrova, now No. 33 in the WTA rankings with 1,696 live points, wrapped up the round in a single set. It matters for her: reaching the quarterfinals is worth 105 points, against 55 for the round of 16.

The bigger story, though, concerns the race for the WTA Finals. With Kostyuk's retirement, Karolina Muchova secured the last singles spot at the season-ending event, scheduled for November 8-15 in Indian Wells, California. The WTA had explained that Kostyuk needed to reach the final in Ningbo to stop Muchova, who is not playing this week, from clinching a place. The Ukrainian's tournament ended in the round of 16, and the Czech could celebrate without hitting a ball.

The other seven singles qualifiers are Elena Rybakina, Aryna Sabalenka, Mirra Andreeva, Jessica Pegula, Coco Gauff, Elina Svitolina and Linda Noskova. Iga Swiatek was also in contention for a place, but she withdrew from Ningbo with a thigh problem and said her season is over. For Muchova it is one more milestone in a special year: she reached the Wimbledon final against Noskova and then, teaming up with her, won the Billie Jean King Cup for the Czech Republic.

On Kostyuk, the source is the player herself. The Ukrainian had already missed the Billie Jean King Cup Finals in September with a wrist problem. After the retirement she wrote on social media, as reported by the Associated Press: "The pain in my wrist came back, and as much as I want to keep playing, I know I need to give it more time to recover." We add nothing on this: she speaks for herself.

What remains is the picture of a very good season for Kostyuk. She is now No. 10 with 3,920 points, a career-high ranking reached on September 14, 2026. She made the Wimbledon semifinal, losing 6-4 6-4 to Noskova, and beat Alexandrova herself 6-3 6-2 in the third round of the US Open. The last few weeks have been tougher: in her last ten matches she has won four and lost six, with defeats against Maria Sakkari in Wuhan and Liudmila Samsonova in Guadalajara.

For Alexandrova the picture has two sides. The 31-year-old Russian reached a career-high No. 18 on August 14, 2026, and compared with July 27 she has lost 14 places. In 2025 she finished with 45 wins, 23 defeats and one title; in her last ten matches she has won seven and lost three. Her 2026 has brought quarterfinals at the WTA 1000 events in Toronto and Beijing, but also two third-round exits at the Slams, at Wimbledon and the US Open.

In Beijing she beat Aliaksandra Sasnovich 6-1 6-4, Diana Shnaider 3-6 6-4 6-3 and Linda Noskova 6-2 6-2 before losing in the quarterfinals to Andreeva 7-6(4) 7-6(3). In Ningbo she began by beating Hanyu Guo 6-2 6-3. In Wuhan, by contrast, she went out in the second round, beaten by her next opponent. And this is where the draw gets interesting.

On Friday, October 23, in the quarterfinals, Alexandrova will face Leylah Annie Fernandez. The Canadian, world No. 28 with 1,814 points, beat Sasnovich 7-5 6-7(3) 6-3 in the round of 16, the longest match of the tournament so far at 34 games. In the previous round she had come back against Elise Mertens, 2-6 6-3 7-5. According to the Associated Press, it was her 11th win in her last 14 matches.

The head-to-head stands at 3-2 for Alexandrova. The Russian won in Cincinnati in 2022 by 6-4 7-5, at the 2023 US Open by 7-6(4) 5-7 6-4 and in Adelaide in 2025 by 6-4 3-6 6-2. Fernandez won in Adelaide in 2022, 6-3 6-4, and above all recently in Wuhan, 6-4 3-6 6-3. Three of their five meetings went to a third set, which suggests another hard-fought match.

Fernandez arrives with the wind in her sails. The 24-year-old Canadian won the Singapore Tennis Open this year, beating Talia Gibson 7-5 6-0 in the final after eliminating Mirra Andreeva in the quarterfinals and Maja Chwalinska in the semifinals. Her career-high ranking is No. 24, reached on July 7, 2026, and she has won eight of her last ten matches. In 2025 she won two titles.

The rankings are at stake too. In 2025 Alexandrova reached the final in Ningbo, losing to Rybakina 3-6 6-0 6-2, and those 325 points expire with the 2026 edition. According to the site, the theoretical maximum after winning the title would take her to 2,091 points; every round won is therefore, first of all, about limiting the damage.

The tournament, meanwhile, goes on. The 2026 edition began on October 19 and features 26 players from 19 countries, with Russia, which has three players in the draw, the most represented nation. So far 16 matches have been played, with four tie-breaks and two retirements: Kostyuk's and Jelena Ostapenko's against Belinda Bencic, at 6-3 1-1. The 2025 title went to Rybakina; in 2024 Daria Kasatkina won, beating Andreeva 6-0 4-6 6-4.

The other quarterfinal already set will be all-Czech. Sara Bejlek beat Sorana Cirstea 7-6(3) 6-4, Marie Bouzkova got past Anastasia Zakharova 7-5 6-2, and on Friday they will play for a place in the semifinals. On Thursday, October 22, four round-of-16 matches remain: Iva Jovic against Jasmine Paolini, Katarzyna Kawa against Bencic, Alexandra Eala against Shnaider and Rybakina against Polina Kudermetova.

For Italy, the name to follow is Paolini, the only Italian left in the draw, who faces Jovic on Thursday. Whoever beats her joins Bejlek, Bouzkova, Fernandez and Alexandrova in the quarterfinals.

Alexandrova's record against Kostyuk is now 3-1 in the Russian's favor. The first win came in Rome in 2021, 6-3 6-1; the second in Portoroz in 2022, in three sets, 7-6(5) 5-7 7-5. Then the 2026 US Open for the Ukrainian and now this win by retirement. The draw will always say 6-4 ret., but the real match, for Alexandrova, starts on Friday.

Kostyuk is left with her No. 10 ranking, the best of her career, and the recovery she wrote about herself. Alexandrova has a concrete chance to turn a mixed season into an autumn finish worth remembering, with last year's final still fresh in her memory and a tournament to win one match at a time.