Marat Mansurovych Deviatiarov (Ukrainian: Марат Мансурович Дев'ятьяров; born 19 April 1994 in Kharkiv) is a Ukrainian former tennis player.

Deviatiarov has a career-high singles ranking by the ATP of 538, achieved on 25 May 2015. He also has a career-high ATP doubles ranking of 315, achieved on 25 September 2017.

Deviatiarov has represented Ukraine at the Davis Cup where he has a win/loss record of 1–0.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Feb 2013	Ukraine F1, Cherkasy	Futures	Hard (i)	Grzegorz Panfil	3–6, 3–6
Loss	0–2	Jun 2013	Turkey F25, Istanbul	Futures	Hard	Rémi Boutillier	6–7(3–7), 4–6
Loss	0–3	Nov 2016	Estonia F3, Tallinn	Futures	Hard (i)	Niels Lootsma	2–6, 4–6
Loss	0–4	Jul 2017	Egypt F19, Sharm El Sheikh	Futures	Hard	Youssef Hossam	3–6, 2–6
Loss	0–5	Apr 2018	Israel F4, Ramat HaSharon	Futures	Hard	Alessandro Bega	3–6, 1–6
Loss	0–6	Aug 2019	M15 Kiryat Shmona, Israel	World Tennis Tour	Hard	Alessandro Bega	2–6, 6–1, 4–6
Win	1–6	Oct 2019	M15 Doha, Qatar	World Tennis Tour	Hard	Adam Moundir	6–2, 6–3

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Oct 2013	Armenia F1, Yerevan	Futures	Clay	Vladyslav Manafov	Michael Linzer Yannik Reuter	6–7(6–8), 3–6
Loss	0–2	Mar 2014	Ukraine F3, Cherkassy	Futures	Hard	Pirmin Hänle	Vladyslav Manafov Filip Veger	2–6, 3–6
Loss	0–3	May 2014	France F9	Futures	Clay	Pablo Galdón	Benjamin Balleret Jonathan Eysseric	6–7(7–9), 5–7
Loss	0–4	May 2014	Turkey F17	Futures	Hard	Andrei Plotniy	Artur Dubinski Vladimir Kruk	6–7(15–17), 6–3, [9–11]
Win	1–4	Jun 2014	Turkey F18	Futures	Hard	Baris Ergüden	Cem Ilkel Efe Yurtacan	7–5, 6–2
Loss	1–5	Jun 2014	Ukraine F7	Futures	Hard	Jaime Pulgar-Garcia	Vladyslav Manafov Volodymyr Uzhylovskyi	5–7, 2–6
Loss	1–6	Aug 2014	Lithuania F1	Futures	Clay	Jérôme Inzerillo	Maxim Dubarenco Peter Kobelt	6–4, 6–7(2–7), [8–10]
Win	2–6	Aug 2014	Turkey F28	Futures	Hard	Alexios Halebian	Juan Sebastián Gómez Gabriel Trujillo Soler	6–4, 6–7(2–7), [10–2]
Win	3–6	Feb 2015	Turkey F7, Antalya	Futures	Clay	Tristan-Samuel Weissborn	Ruan Roelofse Tucker Vorster	7–6(7–5), 6–2
Loss	3–7	Feb 2015	Turkey F8, Antalya	Futures	Hard	Tristan-Samuel Weissborn	Ruan Roelofse Tucker Vorster	7–6(7–5), 6–7(4–7), [10–12]
Loss	3–8	Apr 2015	Turkey F16, Antalya	Futures	Hard	Michael Geerts	Yannick Jankovits Hugo Nys	6–7(6–8), 1–6
Win	4–8	May 2015	Ukraine F2, Cherkassy	Futures	Hard	Maxime Janvier	Vladyslav Manafov Volodymyr Uzhylovskyi	6–2, 6–2
Loss	4–9	May 2015	Ukraine F3, Cherkassy	Futures	Hard	Volodymyr Uzhylovskyi	Bogdan Didenko Levar Harper-Griffith	4–6, 2–6
Win	5–9	Oct 2015	Ukraine F4, Cherkassy	Futures	Clay	Libor Salaba	Mauricio Perez-Mota François-Arthur Vibert	6–2, 6–1
Win	6–9	Oct 2015	Ukraine F5, Cherkassy	Futures	Clay	Libor Salaba	Vladyslav Manafov Volodymyr Uzhylovskyi	1–6, 6–4, [10–7]
Win	7–9	Oct 2015	Ukraine F6, Cherkassy	Futures	Clay	Libor Salaba	Vitalii Shcherba Vitaliy Sachko	6–4, 6–3
Win	8–9	Mar 2016	Azerbaijan F5, Baku	Futures	Carpet	Danylo Kalenichenko	Alexander Igoshin Yan Sabanin	6–4, 6–4
Loss	8–10	Oct 2016	Ukraine F6, Kyiv	Futures	Hard	Francesco Vilardo	Lukas Mugevicius Vladyslav Manafov	2–6, 2–6
Win	9–10	Nov 2016	Estonia F4, Pärnu	Futures	Hard	Aleksandr Vasilenko	Vladimir Ivanov Kenneth Raisma	w/o
Loss	9–11	Dec 2016	Turkey F48, Antalya	Futures	Hard	Alexandar Lazov	Tuna Altuna Cem Ilkel	4–6, 2–6
Loss	9–12	Feb 2017	Turkey F5, Antalya	Futures	Hard	Yuichi Ito	Michal Konecny Matej Vocel	3–6, 6–3, [7–10]
Loss	9–13	Mar 2017	Portugal F2, Faro	Futures	Hard	Antoine Bellier	James Marsalek Lucas Miedler	7–5, 1–6, [6–10]
Loss	9–14	Mar 2017	Portugal F5, Quinta Da Marinha	Futures	Clay	Gonçalo Oliveira	Clemens Geens Jeroen Vanneste	1–6, 6–4, [4–10]
Loss	9–15	Jul 2017	Egypt F18, Sharm El Sheikh	Futures	Hard	Issam Haitham Taweel	Youssef Hossam Junior A. Ore	2–6, 3–6
Win	10–15	Jul 2017	Egypt F19, Sharm El Sheikh	Futures	Hard	Tomas Papik	Benjamin Lock Nathaniel Lammons	6–4, 1–6, [10–5]
Win	11–15	Jul 2017	Turkey F27, Istanbul	Futures	Clay	Sarp Ağabigün	Alexander Igoshin Vasko Mladenov	6–2, 7–6(7–5)
Win	12–15	Aug 2017	Turkey F28, Erzurum	Futures	Hard	Vladyslav Manafov	Alon Elia Igor Smilansky	5–7, 6–1, [10–5]
Loss	12–16	Nov 2017	Estonia F4, Pärnu	Futures	Hard	Alexander Igoshin	Ivan Liutarevich Denys Mylokostov	6–4, 3–6, [10–12]
Loss	12–17	Mar 2018	Israel F2, Ramat HaSharon	Futures	Hard	Volodymyr Uzhylovskyi	Harri Heliövaara Patrik Niklas-Salminen	3–6, 2–6
Loss	12–18	Apr 2018	Egypt F12, Sharm El Sheikh	Futures	Hard	Vladyslav Manafov	Teymuraz Gabashvili Lucas Miedler	4–6, 0–6
Loss	12–19	Jun 2018	Spain F16, Palma del Rio	Futures	Hard	Evan Hoyt	Mick Lescure Eduardo Struvay	5–7, 4–6
Win	13–19	Jul 2018	Spain F17, Bakio	Futures	Hard	Evan Hoyt	Sergey Betov Ivan Gakhov	6–7(4–7), 7–5, [10–5]
Loss	13–20	Jul 2018	France F13, Ajaccio	Futures	Hard	Benjamin Lock	Mick Lescure Yannick Mertens	5−7, 6–7(6–8)
Win	14–20	Mar 2019	Egypt M15, Sharm El Sheikh	World Tour Tennis	Hard	Jakub Paul	Daniel Michalski Kacper Żuk	6−3, 6–4
Loss	14–21	May 2019	M15 Casale Monferrato, Italy	World Tour Tennis	Clay	Francesco Vilardo	Francesco Forti Mattia Frinzi	4−6, 4–6
Win	15–21	Jul 2019	M15 Castelo Branco, Portugal	World Tour Tennis	Hard	Eduardo Struvay	Francisco Dias Goncalo Falcao	6−4, 7–5
Win	16–21	Aug 2019	M15 Chitila, Romania	World Tour Tennis	Clay	Amaury Delmas	Vladimir Filip Luca George Tatomir	7−6(7–5), 6–3
Loss	16–22	Aug 2019	M15 Kiryat Shmona, Israel	World Tour Tennis	Hard	Takuto Niki	Federico Bertuccioli Andrea Picchione	6−4, 4–6, [12−14]
Loss	16–23	Feb 2021	M15 St. Petersburg, Russia	World Tour Tennis	Hard	Alexandr Cozbinov	Andrew Paulson Patrik Rikl	6−4, 4–6, [8−10]
Loss	16–24	Mar 2021	Egypt M15, Sharm El Sheikh	World Tour Tennis	Hard	Volodymyr Uzhylovskyi	Ryan Nijboer Neil Oberleitner	0−6, 7–5, [6−10]
Win	17–24	May 2021	M15 Jerusalem, Israel	World Tour Tennis	Hard	Alexandr Cozbinov	Julian Cash Felix Corwin	w/o
Win	18–24	Sep 2021	M15 Ulcinj, Montenegro	World Tour Tennis	Clay	Max Houkes	Andrea Basso Gianmarco Ferrari	7−5, 6−1
Win	19–24	Oct 2021	Egypt M15, Sharm El Sheikh	World Tour Tennis	Hard	Volodymyr Uzhylovskyi	Pijus Vaitiekunas Simonas Zukauskas	6−4, 6−1
Win	20–24	Dec 2021	M15 Doha, Qatar	World Tour Tennis	Hard	Hsu Yu-hsiou	Huang Tsung-hao Saba Purtseladze	6−1, 6−0
Loss	20–25	Jan 2022	M15 Monastir, Tunesia	World Tour Tennis	Hard	Loic Cloes	Naoki Tajima Kaito Uesugi	w/o

• Marat Deviatiarov at the Association of Tennis Professionals
• Marat Deviatiarov at the International Tennis Federation
• Marat Deviatiarov at the Davis Cup