WTA Tokyo | 09/21 10:55 | 26 | [50] Katerina Siniakova v Dominika Cibulkova [9] | 2-6,2-6 | |
WTA Tokyo | 09/19 08:15 | 25 | Katerina Siniakova v Jana Cepelova | 1-6,6-3,6-4 | |
US Open Women | 08/29 15:00 | 23 | [4] Elina Svitolina v Katerina Siniakova [42] | 6-0,6-7,6-3 | |
WTA New Haven | 08/21 14:00 | 25 | [41] Katerina Siniakova v Shuai Peng [23] | 6-1,3-6,6-7 | |
WTA Cincinnati | 08/14 18:05 | 24 | [41] Katerina Siniakova v Camila Giorgi [82] | 2-6,2-6 | |
WTA Toronto | 08/09 18:35 | 25 | [40] Katerina Siniakova v Venus Williams [9] | 5-7,5-7 | |
WTA Toronto | 08/07 23:35 | 24 | [40] Katerina Siniakova v Mariana Duque Marino [107] | 4-6,6-0,6-4 | |
WTA Bastad | 07/30 14:45 | 29 | [6] Caroline Wozniacki v Katerina Siniakova [56] | 3-6,4-6 | |
WTA Bastad | 07/29 11:00 | 28 | [20] Caroline Garcia v Katerina Siniakova [56] | 2-6,5-7 | |
WTA Bastad | 07/28 12:00 | 27 | [56] Katerina Siniakova v Anastasija Sevastova [17] | 6-3,5-7,7-5 | |
WTA Bastad | 07/26 09:00 | 26 | [56] Katerina Siniakova v Arantxa Rus [145] | 7-6,6-4 | |
WTA Bastad | 07/24 16:25 | 25 | [56] Katerina Siniakova v Rebecca Peterson [170] | 6-3,3-6,6-1 | |
Wimbledon Women | 07/03 14:45 | 23 | [39] Katerina Siniakova v Maria Sakkari [101] | 3-6,4-6 | |
WTA Eastbourne | 06/26 10:00 | 24 | [62] Sorana Cirstea v Katerina Siniakova [39] | 6-3,6-2 | |
WTA Birmingham | 06/21 10:30 | 26 | [40] Katerina Siniakova v Daria Gavrilova [21] | 5-7,6-2,4-6 | |
WTA Birmingham | 06/20 10:00 | 25 | [87] Nao Hibino v Katerina Siniakova [40] | 5-7,5-7 | |
French Open Women | 05/29 12:50 | 23 | [86] Ekaterina Alexandrova v Katerina Siniakova [38] | 6-4,2-6,6-2 | |
WTA Rome | 05/16 16:25 | 25 | [37] Katerina Siniakova v Svetlana Kuznetsova [8] | 1-6,6-7 | |
WTA Rome | 05/15 09:00 | 24 | [37] Katerina Siniakova v Shuai Zhang [31] | 5-7,6-3,7-6 | |
WTA Madrid | 05/08 11:30 | 25 | [2] Angelique Kerber v Katerina Siniakova [39] | 6-2,1-6,7-5 | |
WTA Madrid | 05/07 17:15 | 24 | [39] Katerina Siniakova v Pauline Parmentier [70] | 6-1,6-0 | |
WTA Prague | 05/04 11:20 | 27 | [18] Barbora Strycova v Katerina Siniakova [39] | 6-3,5-7,6-3 | |
WTA Prague | 05/03 09:00 | 26 | [77] Natalia Vikhlyantseva v Katerina Siniakova [38] | 6-4,4-6,4-6 | |
WTA Prague | 05/02 12:20 | 25 | [108] Danka Kovinic v Katerina Siniakova [38] | 2-6,6-4,2-6 | |
2017 Fed Cup | 04/23 15:00 | - | [24] Coco Vandeweghe v Katerina Siniakova [38] | 6-4,6-0 | |
2017 Fed Cup | 04/22 17:45 | - | [49] Shelby Rogers v Katerina Siniakova [38] | 3-6,3-6 | |
WTA Bogota | 04/12 15:30 | 26 | [93] Sara Sorribes Tormo v Katerina Siniakova [38] | 6-2,6-3 | |
WTA Bogota | 04/11 19:55 | 25 | [208] Jil Teichmann v Katerina Siniakova [38] | 0-6,4-6 | |
WTA Charleston | 04/03 16:00 | 24 | [36] Katerina Siniakova v Monica Puig [40] | Retired | |
WTA Miami | 03/22 17:00 | 23 | [158] Bethanie Mattek-Sands v Katerina Siniakova [37] | 6-3,4-6,6-4 |
Kateřina Siniaková (Czech pronunciation: [ˈkatɛr̝ɪna ˈsɪɲakovaː]; 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. She became world No. 1 for the first time in October 2018, and has held the top ranking in doubles for a total of 115 weeks, the sixhth 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. 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.
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.