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 nine 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 7–7 as of November 2024. 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 thd 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 deciding 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.

Apparel and equipment

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

Performance timelines

Doubles

Significant finals

WTA Elite Trophy

Singles: 1 (title)

WTA Tour finals

Doubles: 19 (9 titles, 10 runner-ups)

WTA Challenger finals

Doubles: 2 (2 runner-ups)

ITF Circuit finals

Singles: 11 (4 titles, 7 runner–ups)

Doubles: 46 (24 titles, 22 runner–ups)