[3] At the Dubai Tennis Championships, she made the final in doubles, partnering Jeļena Ostapenko but they were defeated by second seeds Veronika Kudermetova and Elise Mertens.

[4] At the French Open, she reached the semifinals of a major for the first time in her career, partnering again with Ostapenko, falling to the eventual champions, Caroline Garcia and Kristina Mladenovic.

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

[13] At the US Open, seeded seventh in doubles, she reached another Grand Slam final with her partner Jelena Ostapenko, defeating Anna Danilina and Irina Khromacheva in the quarterfinal,[14][15] and then Veronika Kudermetova and Chan Hao-ching in the semifinal, also in straight sets, 6–1, 6–2.

[16][17][18][19] Ostapenko and Kichenok defeated Kristina Mladenovic and Zhang Shuai in the final, in straight sets, to lift their first a Grand Slam trophy together, becoming the first Latvian and Ukrainian champions in women’s doubles.

[21] Kichenok and Ostapenko qualified for the end-of-season WTA Finals in Riyadh, Saudi Arabia, as top seeds but were eliminated in the group stages after losing all three of their matches.

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

[23][24] Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.