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The Daily Insight

Daniel Siniakov (Tennis Player): Who is Kateřina Siniaková’s brother?

Author

Sarah Richards

Published Feb 11, 2026

Kateřina Siniaková is a Czech professional tennis player.

Siniaková began playing on the ITF Women’s Circuit in the Czech Republic in June 2012 and won her first ITF title in a doubles competition.

The 26-year-old Siniaková is a four-time major champion, having won the 2018 French Open, 2018 Wimbledon Championships, 2021 French Open and 2022 Australian Open in women’s doubles, all partnering Barbora Krejčíková.

She was part of the Czech team that won the 2018 Fed Cup, winning the clinching match.

Siniaková achieved her career-high WTA rankings of No. 31 in singles and No. 1 in doubles in October 2018.

Daniel Siniakov (Tennis Player): Who is Kateřina Siniaková’s brother?

Daniel Siniakov is the younger brother of Kateřina Siniaková.

Daniel is also a Czech professional tennis player.

He was born on January 15, 2003, in Hradec Králové, Czech Republic, to tennis coach Dmitri Siniakov and Hana Siniakova.

Siniakov, 19, achieved a career-high ITF junior Single ranking of No. 86 and a doubles ranking of No. 86 in January 2021.

Daniel Siniakov is a Right-handed player and is currently ranked No. 1084 on the ATP rankings with 8 points.