Kateřina Siniaková

Kateřina Siniaková ( born 10 May 1996) is a Czech professional tennis player.

She is a former world No. 1 in doubles.

Siniaková is a seven-time Grand Slam champion in women's doubles, partnering fellow Czech Barbora Krejčíková, having completed the career Super Slam in the discipline.

The pairing also finished runners-up at the 2021 Australian Open, and Siniaková reached the final at the 2017 US Open with Lucie Hradecká.

Her younger brother Daniel (born 2003) is also a professional tennis player.

Since the COVID-19 quarantine at the 2021 Australian Open, Siniaková has been dating fellow Czech tennis player Tomáš Macháč.

She was ranked the world No. 2 junior tennis player in December 2012.

She began playing on the ITF Women's Circuit in the Czech Republic in June 2012.

There in a doubles competition, she won her first ITF title.

With fellow Czech Barbora Krejčíková, she won the girls' doubles titles at the French Open, at Wimbledon and the US Open in 2013.

She then made big progress in 2013.

She started outside top 1000 in both singles and doubles, but finished year inside top 200 in singles and top 300 in doubles.

In March 2013, she won her first ITF singles title at the $10k Frauenfeld, defeating Kathinka von Deichmann in the three sets.

Two weeks later, Siniaková made her debut on the WTA Tour in the qualifying draw of Miami Open.

She passed qualifying defeating Mandy Minella and Alexa Glatch, but then lost a three-set encounter with Garbiñe Muguruza in the first round of the main draw.

In November 2013, she reached her first major ITF final at the $75k Sharm El Sheikh event in doubles, but lost alongside Anna Morgina.

At the 2014 Australian Open, she made her major debut, after passing qualifying but then lost to Zarina Diyas in the first round of the main draw.

In July 2014, she won her first match on WTA Tour at the İstanbul Cup defeating Julia Glushko in the first round.

Nearly after that, she reached her first WTA doubles final at the Silicon Valley Classic alongside Paula Kania, but they lost to Garbiñe Muguruza and Carla Suárez Navarro.

She then went one step further, winning her first WTA doubles title at the Tashkent Open, partnering Aleksandra Krunić.

Right after that she made her top 100 debut in doubles.

In October 2014, she reached singles semifinals of the Premier-level Kremlin Cup but lost her match against Anastasia Pavlyuchenkova.

This brought her into the top 100 in singles, and a week later, she won the title at the $50k Open Nantes Atlantique defeating Ons Jabeur.

She finished year with another title at the Open de Limoges, alongside Renata Voráčová.

At the Australian Open, Siniaková had her first singles Grand Slam win, defeating Elena Vesnina in the first round.

In the following round, she lost to Irina-Camelia Begu.

In March 2015, she won her first WTA 1000 match at the Premier Mandatory-level Indian Wells Open, defeating another Russian player, Evgeniya Rodina.

In May 2015, she had good performances, reaching the singles semifinal and taking the doubles title with Belinda Bencic at the Prague Open.

However, after a run to the third-round at the French Open alongside Bencic, she reached top 50.

In June 2015, she reached the quarterfinal of the Premier-level Birmingham Classic.

By the end of the year, she was standing out more in doubles, reaching final of the Tashkent Open and semifinal of the Premier-level Kremlin Cup.

Siniaková started slowly into the 2016 season, but then shone at the French Open, where she reached semifinals in doubles alongside Barbora Krejčíková.

Then, at 2016 Wimbledon, she reached her first singles Grand Slam third round, after defeating Pauline Parmentier and 30th seed Caroline Garcia before being defeated by former world No. 2, Agnieszka Radwańska.

Things even got better in July 2016, when she reached her first singles WTA final in Båstad, at the Swedish Open.

She became world No. 1 for the first time in October 2018, and has held the top ranking in doubles for a total of 94 weeks, the eighth highest total since the beginning of the WTA rankings.

Siniaková has won 24 doubles titles on the WTA Tour, including the 2021 WTA Finals and three at WTA 1000 level.

In singles, Siniaková reached her career-high ranking of world No. 31 in October 2018, and has won five WTA titles, at the Shenzhen Open and Swedish Open in 2017, the Slovenia Open in 2022, and the Bad Homburg Open and Jiangxi Open in 2023.

Siniaková was part of the Czech team which won the 2018 Fed Cup, and also won doubles gold at the 2020 Tokyo Olympics alongside Krejčíková.

Siniaková was born to a Czech mother Hana, an accountant, and Russian father Dmitry, a former boxer and her coach.

Her best major result was at the 2019 French Open, upsetting world No. 1 and reigning US and Australian Open champion Naomi Osaka en route to the fourth round; she has also reached the third round at seven other major tournaments.