Kateřina Siniaková, born on May 10, 1996, in Hradec Králové, Czech Republic, is a professional tennis player renowned for her exceptional skills in doubles. She has achieved significant success alongside her compatriot Barbora Krejčíková, with whom she has secured multiple Grand Slam titles, including the Australian Open, French Open, and Wimbledon. Their partnership has been instrumental in Siniaková’s ascent to the world No. 1 ranking in doubles, a position she has held multiple times.
In singles, Siniaková reached her career-high ranking of world No. 31 in October 2018. She has claimed four WTA singles titles, with victories at the Shenzhen Open and the Swedish Open in 2017, the Slovenian Open in 2022, and the Bad Homburg Open in 2023. Her best performance in a Grand Slam singles event was at the 2019 French Open, where she advanced to the fourth round after a notable win against world No. 1 Naomi Osaka.
Siniaková’s prowess extends to mixed doubles, where she achieved a significant milestone by winning the gold medal at the 2024 Paris Olympics alongside Tomáš Macháč.
At the 2025 Australian Open, Siniaková, partnering with Taylor Townsend, clinched the women’s doubles title. They triumphed over Jelena Ostapenko and Hsieh Su-wei in a thrilling final, with match scores of 6-2, 6-7(4), 6-3. This victory marked their second Grand Slam title together, following their win at Wimbledon the previous year, and added to Siniaková’s impressive tally of major titles.
In February 2025, Siniaková faced Paula Badosa in the first round of the WTA 1000 tournament in Doha. Ranked 54th in the world, Siniaková’s formidable presence in doubles adds a competitive edge to her singles play, making her a challenging opponent on the court.
Beyond her on-court achievements, Siniaková’s background includes a Czech mother, Hana, a former accountant, and a Russian father, Dmitry, a former boxer and her coach. Her younger brother, Daniel, is also a professional tennis player. Since the 2021 Australian Open, Siniaková has been in a relationship with fellow Czech tennis player Jiří Lehečka.