Nikita Marselovych Mashtakov (; born 18 March 1999) is a Ukrainian tennis player. He has a career high ATP singles ranking of world No. 505 achieved on 28 September 2026 and a doubles ranking of No. 438 achieved on 20 October 2025.

On the junior tour, Mashtakov has a career high ranking of No. 24, achieved on 23 January 2017.

Mashtakov has represented Ukraine in the Davis Cup, where he has a win–loss record of 0–1.

ATP Challenger and ITF Tour Finals

Singles: 7 (4–3) Legend (singles)ATP Challenger Tour (0–0)ITF World Tennis Tour (4–3)Titles by surfaceHard (0–1)Clay (4–2)Grass (0–0)Carpet (0–0)

ResultW–LDateTournamentTierSurfaceOpponentScoreWin1–0Jun 2019M15 Telavi, GeorgiaWorld Tennis TourClay Dennis Uspensky6–3, 6-4Loss1–1Aug 2019M15 Irpin, Ukraine World Tennis TourClay Vladyslav Orlov3–6, 1-6Loss1–2Jul 2024M15 Łódź, Poland World Tennis TourClay Maciej Rajski2–6, 6–7(3–7)Loss1–3Apr 2026M15 Heraklion, Greece World Tennis TourHard Menelaos Efstathiou6–2, 3–6, 2–6Win2–3Jun 2026M25 Samobor, Croatia World Tennis TourClay Andrej Nedić7–5, 6–7(5–7), 6–1Win3–3Aug 2026M15 Mistelbach, Austria World Tennis TourClay Thilo Behrmann2–6, 6–3, 6–4Win4–3Oct 2026M15 Šibenik, Croatia World Tennis TourClay Noah Lopez6–0, 6–4

Doubles: 7 (3–4) LegendATP Challenger Tour (0–0)ITF Futures/World Tennis Tour (3–4)Finals by surfaceHard (0–2)Clay (3–2)Grass (0–0) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Egypt F29, Sharm El SheikhFuturesHard Aliaksandr Liaonenka Peter Bothwell David Pérez Sanz0–6, 3–6Loss0–2M15 Chornomorsk, UkraineWorld Tennis TourClay Dmytro Kamynin Mátyás Füle Gergely Madarász6–4, 2–6, [11–13]Win1–2M15 Novomoskovsk, UkraineWorld Tennis TourClay Danylo Kalenichenko Carlos Sánchez Jover José Francisco Vidal Azorín5–7, 6–4, [10–8] Loss1–3M25 Antalya, TurkeyWorld Tennis TourClay Anthony Genov Gökberk Sarıtaş Mert Naci Türker6–4, 3–6, [7–10]Win2–3M15 Bol, CroatiaWorld Tennis TourClay Mirza Bašić Igor Dudun Ivan Kremenchutskyi7–5, 6–2Win3–3M15 Wrocław, PolandWorld Tennis TourClay Robert Strombachs Szymon Walków Kacper Żuk 7–6(7–5), 7–5Loss3–4 M15 Szabolcsveresmart, HungaryWorld Tennis TourHard Matt Ponchet Illya Beloborodko Jan Jermar 3–6, 4–6

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