Nadiia Viktorivna Kichenok (, born 20 July 1992) is a Ukrainian professional tennis player. On 31 January 2022, she reached a career-high of No. 29 in the WTA doubles rankings. Kichenok has won eleven doubles titles on the WTA Tour, including four with her twin sister Lyudmyla. She has also won four singles titles and 24 doubles titles on the ITF Women's Circuit. On 6 January 2014, she also reached a career-high singles ranking of No. 100.

Career Playing for Ukraine Fed Cup team, Kichenok has a win–loss record of 10–7, as of August 2026.

In 2015, Nadiia and Lyudmyla came back from a 0–5 deficit in the second set tie-break of their 6–4, 7–6 defeat of Liang Chen and Wang Yafan in the Shenzhen Open final. That made the Kichenoks the second pair of twins, after Karolína and Kristýna Plíšková, to win a WTA Tour doubles title. They had previously been runners-up at Tashkent in 2011, and at Shenzhen in 2014.

Partnering with Raluca Olaru, she defeated Kaitlyn Christian and Sabrina Santamaria in the final to claim the doubles title at the 2021 St. Petersburg Ladies' Trophy. They also won the 2021 Chicago Women's Open, winning the final against her sister Lyudmyla and Makoto Ninomiya in a deciding champions tiebreak.

At the inaugural edition of the Tallinn Open in 2022, seeded third with her sister, she won her eighth title defeating top seeds Nicole Melichar and Laura Siegemund in the final.

At the 2023 Ladies Linz, she reached the final with Anna-Lena Friedsam, losing to Natela Dzalamidze and her partner Viktória Kužmová in a champions tiebreak.

With her sister, she reached the quarterfinals at the 2024 Paris Olympics.

In Ukraine's 2024 Billie Jean King Cup play-offs tie against Austria, Kichenok partnered with Katarina Zavatska to defeat Sinja Kraus and Tamira Paszek in the deciding doubles match.

Partnering with her sister Lyudmyla, she was runner-up in the doubles at the 2025 Linz Open, losing to Tímea Babos and Luisa Stefani in the final which went to a deciding champions tiebreak.

Apparel and equipment Nadiia Kichenok is sponsored by Mizuno and Wilson (racket).

Performance timelines

Doubles Tournament2014201520162017201820192020202120222023202420252026SRW–L Australian OpenAA2R1R3R2R1R2R1R2R1R3R2R0 / 119–11 French OpenA1R2R1R2R3R1R2R1R1RQF1R3R0 / 1210–12 Wimbledon2R1R1R2R2R3RNH3R3R1RQF1R1R0 / 1212–12 US OpenA2R2R2R1R2R1R3R1R2R1R1R0 / 117–11Win–loss1–11–33–42–44–46–40–36–42–42–46–42–43–30 / 4638–46

Significant finals WTA Elite Trophy Singles: 1 (title) ResultYearLocationSurfacePartnerOpponentsScoreWin2018Zhuhai, ChinaHard (i) Lyudmyla Kichenok Shuko Aoyama Lidziya Marozava6–4, 3–6, [10–7]

WTA Tour finals Doubles: 22 (11 titles, 11 runner-ups) LegendWTA Elite Trophy (1–0)WTA 500 (1–4)WTA 250 (9–7)Finals by surfaceHard (9–7)Clay (2–3)Grass (0–1)

ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Tashkent Open, Uzbekistan International Hard Lyudmyla Kichenok Eleni Daniilidou Vitalia Diatchenko 4–6, 3–6Loss 0–2 Shenzhen Open, China International Hard Lyudmyla Kichenok Monica Niculescu Klára Zakopalová 3–6, 4–6Win 1–2 Shenzhen Open, China International Hard Lyudmyla Kichenok Liang Chen Wang Yafan 6–4, 7–6(8–6)Loss 1–3 Internationaux de Strasbourg, France International Clay Zheng Saisai Chuang Chia-jung Liang Chen 6–4, 4–6, [10–12]Win 2–3 Brasil Tennis Cup, Brazil International Hard Lyudmyla Kichenok Tímea Babos Réka Luca Jani 6–3, 6–1Loss 2–4 Monterrey Open, Mexico International Hard Dalila Jakupovic Nao Hibino Alicja Rosolska 2–6, 6–7 (4–7)Win 3–4 İstanbul Cup, Turkey International Clay Dalila Jakupovic Nicole Melichar Elise Mertens 7–6(8–6), 6–2Loss 3–5 Internationaux de Strasbourg, France International Clay Anastasia Rodionova Mihaela Buzărnescu Raluca Olaru 5–7, 5–7Loss 3–6 Silicon Valley Classic, USPremier Hard Lyudmyla Kichenok Latisha Chan Květa Peschke 4–6, 1–6Win 4–6 WTA Elite Trophy, ChinaElite Trophy Hard Lyudmyla Kichenok Shuko Aoyama Lidziya Marozava 6–4, 3–6, [10–7]Win 5–6 Hobart International, Australia International Hard Sania Mirza Peng Shuai Zhang Shuai 6–4, 6–4Win6–6Mar 2021St. Petersburg Trophy, RussiaWTA 500Hard (i) Raluca Olaru Kaitlyn Christian Sabrina Santamaria2–6, 6–3, [10–8]Loss6–7Bad Homburg Open, GermanyWTA 250Grass Raluca Olaru Darija Jurak Andreja Klepač3–6, 1–6Win7–7Chicago Women's Open, USWTA 250Hard Raluca Olaru Lyudmyla Kichenok Makoto Ninomiya7–6(8–6), 5–7, [10–8]Loss7–8Oct 2021Kremlin Cup, RussiaWTA 500Hard (i) Raluca Olaru Jeļena Ostapenko Kateřina Siniaková2–6, 6–4, [8–10]Win8–8Oct 2022Tallinn Open, EstoniaWTA 250Hard (i) Lyudmyla Kichenok Nicole Melichar-Martinez Laura Siegemund7–5, 4–6, [10–7]Loss8–9Feb 2023Linz Open, AustriaWTA 250Hard (i) Anna-Lena Friedsam Natela Dzalamidze Viktória Kužmová6–4, 5–7, [10–12]Win9–9Japan Women's OpenWTA 250Hard Anna-Lena Friedsam Anna Kalinskaya Yulia Putintseva7–6(7–3), 6–3Loss9–10Charleston Open, USWTA 500Clay Lyudmyla Kichenok Ashlyn Krueger Sloane Stephens6–1, 3–6, [7–10]Loss9–11Linz Open, AustriaWTA 500Hard Lyudmyla Kichenok Tímea Babos Luisa Stefani6–3, 5–7, [4–10]Win10–11Hamburg Open, GermanyWTA 250Clay Makoto Ninomiya Anna Bondár Arantxa Rus6–4, 3–6, [11–9]Win11–11Jul 2025Prague Open, Czech RepublicWTA 250Hard Makoto Ninomiya Laura Samson Lucie Havlíčková1–6, 6–4, [10–7]

WTA 125 finals Doubles: 2 (2 runner-ups) ResultW–LDateTournamentSurfacePartnerOpponentsScoreLoss 0–1 Midland Tennis Classic, United States Hard (i) Anna-Lena Friedsam Asia Muhammad Alycia Parks 2–6, 3–6Loss 0–2 Clarins Open Paris, France Clay Alycia Parks Anna Danilina Vera Zvonareva 7–5, 6–7(2), [12–14]

ITF Circuit finals Singles: 11 (4 titles, 7 runner-ups) Legend$100,000 tournaments (1–0)$50,000 tournaments (0–1)$25,000 tournaments (3–4)$10,000 tournaments (0–2)Finals by surfaceHard (4–6)Carpet (0–1) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 Oct 2009ITF Kharkiv, Ukraine10,000 Carpet (i) Lyudmyla Kichenok 7–6(2), 2–6, 3–6Loss 0–2 Apr 2011ITF Minsk, Belarus25,000 Hard (i) Olga Puchkova 2–6, 5–7Loss 0–3 May 2012Fergana Challenger, Uzbekistan25,000 Hard Donna Vekić 2–6, 2–6Loss 0–4 Jun 2012ITF Qarshi, Uzbekistan10,000 Hard Ksenia Milevskaya 4–6, 5–7Win 1–4 Jun 2012ITF Qarshi, Uzbekistan25,000 Hard Tadeja Majerič 6–3, 7–6(3)Loss 1–5 Sep 2012ITF Yoshkar-Ola, Russia25,000 Hard (i) Margarita Gasparyan 5–7, 6–7(3)Loss 1–6 Jan 2013Blossom Cup, China50,000 Hard Varatchaya Wongteanchai 2–6, 7–6(5), 6–7(5)Loss 1–7 Mar 2013ITF Tallinn, Estonia25,000 Hard (i) Aliaksandra Sasnovich 6–7(3), 2–6Win 2–7 Apr 2013ITF Namangan, Uzbekistan25,000 Hard Oksana Kalashnikova 6–2, 6–3Win 3–7 Jul 2013 President's Cup, Kazakhstan 100,000 Hard Maria João Koehler 6–4, 7–5Win 4–7 Nov 2013ITF Astana, Kazakhstan25,000 Hard (i) Ilona Kremen 6–3, 6–1

Doubles: 46 (24 titles, 22 runner-ups) Legend$100,000 tournaments (1–1)$75/80,000 tournaments (0–2)$50/60,000 tournaments (9–4)$25,000 tournaments (12–12)$10,000 tournaments (2–3)Finals by surfaceHard (18–11)Clay (2–9)Carpet (4–2)