People are searching “who is Katerina Siniakova” because she just won another Grand Slam title, and if you don’t follow doubles tennis closely, her name might be new to you. Here’s the full picture: who she is, how she became the most decorated active women’s doubles player in tennis, and what just happened at the 2026 US Open.
Background: Who Is Katerina Siniakova?
Katerina Siniakova is a Czech professional tennis player who has spent most of the last decade near the very top of women’s doubles tennis. She’s held the world No. 1 doubles ranking for more than 180 weeks combined, which puts her among the longest-reigning No. 1 doubles players since the WTA started keeping rankings.
She plays singles too, and has won five WTA singles titles over her career, but doubles is where she’s built her reputation. She first became famous as one half of the “Czech pair,” teaming with Barbora Krejcikova to win seven Grand Slam doubles titles together, including a full career Golden Slam covering all four majors plus an Olympic gold medal.
People are looking her up right now mainly because of her ongoing partnership with American player Taylor Townsend, which has produced several more major titles, and because she just added a fresh trophy to that list this week.
Latest Update
As of September 12, 2026, here is what’s currently known. Siniakova and Taylor Townsend won the 2026 US Open women’s doubles title on September 11, defeating the American wild-card pair of Ashlyn Krueger and Robin Montgomery in three sets, 5-7, 6-0, 6-2, at Arthur Ashe Stadium in New York. This is confirmed by ESPN, NBC Sports, and Xinhua, all reporting on the match directly.
What this title means:
• It’s Siniakova and Townsend’s first US Open title together as a pair, after losing last year’s final to Gabriela Dabrowski and Erin Routliffe
• It completes a career Grand Slam in women’s doubles for Townsend, meaning she has now won all four major doubles titles at least once
• It’s Siniakova’s second career Grand Slam as a player, having already completed one earlier in her career with Krejcikova
The pair had a rocky start to the final, dropping the first set 5-7 after losing early momentum, before turning things around to win the next two sets comfortably. Townsend described feeling extremely nervous going into the match, while Siniakova said she talked her partner through the rough opening stretch.
Beyond this win, there’s no confirmed news of any injury, retirement announcement, or major life event involving Siniakova as of this date. Any claims along those lines circulating online should be treated as unconfirmed unless a credible outlet reports them directly.
Full Profile
Family and Early Life
Siniakova was born in Hradec Kralove, Czech Republic, to a Czech mother, Hana, who works as an accountant, and a Russian father, Dmitry Siniakov, a former boxer who has also coached her throughout her career. Her younger brother, Daniel, born in 2003, is also a professional tennis player.
Career Path
Siniakova started on the junior tennis circuit and began playing on the ITF Women’s Circuit in June 2012. She won junior doubles titles at all three majors she entered in 2013, partnering Krejcikova at the French Open, Wimbledon, and the US Open. She turned into a full-time WTA Tour player soon after, cracking the top 100 in both singles and doubles by the mid-2010s.
Her breakout year in doubles came in 2018, when she and Krejcikova won the French Open and Wimbledon together and rose to the world No. 1 doubles ranking that October. The pair went on to complete a career Golden Slam, winning all four majors plus Olympic gold at the delayed 2020 Tokyo Games. In singles, her best major result came at the 2019 French Open, where she upset then-world No. 1 Naomi Osaka to reach the fourth round.
After she and Krejcikova stopped playing together in late 2023, Siniakova rebuilt her doubles career with a rotating cast of partners before settling into a highly successful partnership with American player Taylor Townsend. Together they’ve won major titles at Wimbledon, the Australian Open, the French Open, and now the US Open, along with an unusual feat called the Sunshine Double, winning both the Indian Wells and Miami tournaments back to back in the same season.
Age
Siniakova was born on May 10, 1996, which makes her 29 years old as of this article’s publish date.
Religion
Siniakova’s religious beliefs are not documented in any verified public source. This should be treated as unconfirmed rather than assumed.
Spouse/Partner
Siniakova is not currently known to be married. She previously dated fellow Czech tennis player Tomas Machac, a relationship that reportedly began around the 2021 Australian Open and ended in July 2024, according to Czech media reports she has not disputed. There is no confirmed report of a current relationship as of this article’s publish date, so her present relationship status should be treated as unconfirmed.
Net Worth
There’s no officially audited net worth figure for Siniakova. Her career prize money alone is documented at more than $16.6 million as of recent WTA figures, which places her among the top 40 all-time prize money earners in women’s tennis. Various unofficial estimates online put her total net worth, including endorsements, at around $5 million, but that number comes from general celebrity-finance sites rather than a verified financial disclosure, so it should be treated as a rough estimate rather than a confirmed fact.
Parents
Her mother, Hana, is an accountant. Her father, Dmitry Siniakov, is a former boxer who has coached her tennis career.
Height
Siniakova is listed at 174 centimeters, or roughly 5 feet 9 inches tall, according to the WTA’s official player profile.
Education
Specific details about Siniakova’s formal schooling beyond her early tennis training in the Czech Republic are not documented in any verified public source. This should be treated as unconfirmed.
Hometown / State of Origin
Siniakova was born in and still lists her residence as Hradec Kralove, a city in the Czech Republic. She was named an honorary citizen of the city in August 2025.
Official Social Media
Siniakova’s official website is siniakovakaterina.com, which is listed as her official site on both the WTA Tour and Wikidata. Readers should be cautious of any social media account claiming to be hers until it’s verified through a credible outlet or the WTA’s own player directory.
| Category | Detail |
|---|---|
| Full Name | Kateřina Siniaková |
| Date of Birth | May 10, 1996 |
| Age | 29 |
| Birthplace | Hradec Kralove, Czech Republic |
| Height | 174 cm (5 ft 9 in) |
| Turned Pro | 2012 |
| Career-High Doubles Ranking | No. 1 (first reached October 2018) |
| Career-High Singles Ranking | No. 27 (June 2024) |
| Grand Slam Doubles Titles | 11 (as of the 2026 US Open) |
| Grand Slam Singles Titles | 0 (best result: 4th round, 2019 French Open) |
| Olympic Medals | 2 gold (2020 Tokyo doubles, 2024 Paris mixed doubles) |
| Current Doubles Partner | Taylor Townsend |
| Career Prize Money | Over $16.6 million (unconfirmed beyond this figure) |
Quick context: A “career Grand Slam” in tennis means winning all four major tournaments (Australian Open, French Open, Wimbledon, and US Open) at least once during a career, whether in the same partnership or with different partners across different years. Siniakova has now done this twice over: once with Barbora Krejcikova, and again with Taylor Townsend as of this week’s US Open win.
Reader Questions (FAQ)
How old is Katerina Siniakova?
She was born on May 10, 1996, making her 29 years old as of September 2026.
Did Katerina Siniakova win the US Open?
Yes. She and partner Taylor Townsend won the 2026 US Open women’s doubles title on September 11, 2026, beating Ashlyn Krueger and Robin Montgomery in three sets. It was their first US Open title together after losing the final the year before.
Who is Katerina Siniakova’s doubles partner?
Her main doubles partner since 2024 has been American player Taylor Townsend. Before that, she spent years playing with fellow Czech player Barbora Krejcikova, winning seven Grand Slam titles together.
How many Grand Slam titles has Katerina Siniakova won?
She has won 11 Grand Slam women’s doubles titles and one mixed doubles major, as of the 2026 US Open. She hasn’t won a Grand Slam singles title, though she’s reached the fourth round at the French Open.
What is Katerina Siniakova’s net worth?
There’s no officially confirmed net worth figure. Her documented career prize money is over $16.6 million, though unofficial estimates of her total net worth, including endorsements, vary and should not be treated as verified.
Is Katerina Siniakova in a relationship?
She previously dated fellow Czech player Tomas Machac, but that relationship reportedly ended in July 2024. There’s no confirmed report of a current relationship, so her present status should be treated as unconfirmed.
Where is Katerina Siniakova from?
She was born in and still calls Hradec Kralove, a city in the Czech Republic, home. The city named her an honorary citizen in August 2025.
Wrap-Up
Katerina Siniakova’s story is a reminder that doubles tennis, even though it gets less attention than singles, can produce just as much sustained dominance. She’s spent years at world No. 1, built two separate career Grand Slams with two different partners, and just added another major trophy to a resume that already ranks among the best in the modern game.
Her partnership with Taylor Townsend looks like the latest chapter of that dominance rather than a one-off run. The pair has now won titles at every level the sport offers, from WTA 1000 events to all four Grand Slams, and they did it with the kind of resilience on display in this week’s final, coming back from a lost first set to close out the match comfortably.
As with any actively competing athlete, some details of her life, like her exact net worth or current relationship status, simply aren’t public record. This page will be updated if or when those details are confirmed by a credible source. For now, the clearest and best-documented fact is the one that put her back in search results this week: another Grand Slam title, and another step further up the list of the greatest doubles players of her generation.
Thomas Andrew is the founder of Odubio.com, a digital platform sharing inspiring biographies, news, and stories about global icons and achievers.