Ekaterina Andreevna Kazionova (; born 13 January 1999) is a Russian tennis player.

Kazionova has career-high WTA rankings of 280 in singles and 310 in doubles. Up to date, she has won three singles titles and eleven doubles tournaments on the ITF Circuit.

Kazionova made her WTA Tour main-draw debut at the 2022 Morocco Open, after receiving a wildcard entry into the doubles tournament, partnering with Yasmine Kabbaj.

ITF Circuit finals LegendW100 tournamentsW75 tournamentsW25/35 tournamentsW10/15 tournaments

Singles: 11 (3 titles, 8 runner-ups) ResultW–LDateTournamentTierSurfaceOpponentScoreLoss 0–1 May 2015ITF Port El Kantaoui, Tunisia10,000 Hard Fatma Al-Nabhani 1–6, 4–6Loss 0–2 Apr 2016ITF Shymkent, Kazakhstan10,000 Clay Kamila Kerimbayeva 4–6, 4–6Loss 0–3 Jan 2017ITF Almaty, Kazakhstan15,000 Hard (i) Polina Monova 3–6, 3–6Loss 0–4 Jan 2018ITF Stuttgart, Germany15,000 Hard (i) Jesika Malečková 2–6, 0–6Loss 0–5 Aug 2018ITF Kazan, Russia15,000 Clay Daria Mishina 1–6, 2–6Loss 0–6 Jul 2019ITF Savitaipale, Finland15,000 Clay Anastasia Kulikova 6–4 6–7(3) 2–6Win 1–6 Oct 2019ITF Oslo, Norway15,000 Hard (i) Verena Meliss 6–3, 6–0Loss 1–7 Nov 2019ITF Pärnu, Estonia15,000 Hard (i) Elena Malõgina 4–6, 6–1, 5–7Win 2–7 Feb 2020ITF Moscow, RussiaW25 Hard (i) Kamilla Rakhimova 6–4, 1–6, 7–6(5)Loss 2–8 Oct 2021ITF Karaganda, KazakhstanW25 Hard (i) Yuliya Hatouka 5–7, 0–6Win 3–8 Jul 2024ITF Casablanca, MoroccoW15 Clay Joëlle Steur 6–3, 7–6(5)

Doubles: 28 (11 titles, 17 runner-ups) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Jul 2016ITF Pärnu, Estonia10k Clay Denīza Marcinkēviča Emily Arbuthnott Anastasia Zarycká 4–6, 5–7 Win 1–1 Sep 2016ITF Kiryat Gat, Israel10k Hard Madeleine Kobelt Vlada Katic Melis Sezer 7–6(5), 6–3Loss 1–2 Oct 2016ITF Tiberias, Israel10k Hard Madeleine Kobelt Vlada Katic Melis Sezer 1–6, 3–6Win 2–2 Apr 2017ITF Istanbul, Turkey15k Hard (i) Elena Rybakina Eleni Daniilidou Vlada Ekshibarova 6–1, 6–3Loss 2–3 May 2017ITF Khimki, Russia25k Hard (i) Daria Kruzhkova Olesya Pervushina Anastasia Potapova 0–6, 1–6Win 3–3 Jul 2017ITF Focșani, Romania15k Clay Oana Gavrilă Martina Colmegna Camelia Hristea 6–2, 6–1Loss 3–4 Nov 2017ITF Ortisei, Italy15k Hard (i) Alena Fomina-Klotz Hélène Scholsen Alina Silich 3–6, 5–7Win 4–4 Oct 2018ITF İstanbul, Turkey25k Hard (i) Polina Monova Tereza Mrdeža Nina Stojanović 6–3, 6–7(5), [10–6]Win 5–4 Feb 2019ITF Shymkent, KazakhstanW15 Hard Anastasia Zakharova Tamara Čurović Elena Malõgina 7–6(4), 6–1Loss 5–5 Mar 2019ITF Sharm El Sheikh, EgyptW15 Hard Gozal Ainitdinova Jacqueline Cabaj Awad İpek Soylu 2–6, 4–6Loss 5–6 Apr 2019ITF Calvi, FranceW25 Hard Linnéa Malmqvist Estelle Cascino Elixane Lechemia 3–6, 2–6Loss 5–7 May 2019ITF Antalya, TurkeyW15 Clay Aleksandra Pospelova Jenny Dürst Chiara Grimm 6–3, 1–6, [3–10]Loss 5–8 May 2019ITF Antalya, TurkeyW15 Clay Angelina Zhuravleva Chiara Grimm Alina Silich 4–6, 2–6Win 6–8 Aug 2019ITF Savitaipale, FinlandW15 Clay Eva Garkusha Anna Makhorkina Sadafmoh Tolibova 6–2, 6–3Loss 6–9 Sep 2019ITF Prague, Czech RepublicW25 Clay Anastasiya Komardina Anastasia Dețiuc Johana Marková 1–6, 3–6Win 7–9 Oct 2019ITF Oslo, NorwayW15 Hard (i) Anna Popescu Iveta Dapkutė Ingrid Vojčináková 3–6, 7–5, [10–5]Win 8–9 Nov 2019ITF Stockholm, SwedenW15 Hard (i) Margarita Ignatjeva Jacqueline Cabaj Awad Oona Orpana 2–6, 7–6(5), [10–4]Win 9–9 Feb 2021ITF Shymkent, KazakhstanW15 Hard (i) Sabina Sharipova Daria Mishina Noel Saidenova 7–5, 2–6, [10–4]Loss 9–10 Feb 2021ITF Moscow, RussiaW25 Hard Shalimar Talbi Valentini Grammatikopoulou Anastasia Zakharova 3–6, 7–5, [8–10]Loss 9–11 Sep 2021ITF Vienna, RussiaW25 Hard Erika Andreeva Carolina Alves Martyna Kubka 7–6(1), 4–6, [7–10]Loss 9–12 Oct 2021ITF Karaganda, KazakhstanW25 Hard (i) Ekaterina Makarova Tamara Čurović Ekaterina Reyngold 6–2, 3–6, [7–10]Loss 9–13 Aug 2022ITF Ust-Kamenogorsk, KazakhstanW25 Hard Zhibek Kulambayeva Ekaterina Maklakova Aleksandra Pospelova 6–7(5), 1–6Loss 9–14 Nov 2022ITF Saint-Étienne, FranceW25 Hard (i) Ekaterina Makarova Conny Perrin Eden Silva 4–6, 6–4, [6–10]Loss 9–15 Mar 2024ITF Karaganda, KazakhstanW15 Hard Asylzhan Arystanbekova Victoria Mikhaylova Anastasiia Poplavska 6–7(5), 3–6Loss 9–16 Jun 2024ITF Kuršumlijska Banja, SerbiaW15 Clay Victoria Borodulina Laura Cíleková Natália Kročková 4–6, 7–5, [3–10]Win 10–16 Aug 2024ITF Mohammedia, MoroccoW35 Clay Celine Simunyu Funa Kozaki Ikumi Yamazaki 6–3, 6–3Win 11–16 May 2025ITF Kuršumlijska Banja, SerbiaW35 Clay Arina Bulatova María Herazo González Draginja Vuković 6–3, 7–6(4)Loss 11–17 Jun 2026Zagreb Ladies Open, CroatiaW100 Clay Rositsa Dencheva Lucija Ćirić Bagarić Angelica Moratelli 5–7, 3–6

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