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Rebeka Masarova (Slovak: Rebeka Masárová, pronounced [ˈrebeka ˈmasaːrɔʋa]; born 6 August 1999) is a Swiss professional tennis player. She has career-high WTA rankings of No. 62 in singles and No. 125 in doubles, achieved in 2023. Masarova won the juniors' 2016 French Open.
| W | F | SF | QF | | RR | Q# | P# | DNQ | A | Z# | PO | G | S | B | NMS | NTI | P | NH |
| Tournament | 2016 | 2017 | 2021 | 2022 | 2023 | 2024 | 2025 | SR | W–L | Win% | |
| Grand Slam tournaments | |||||||||||
| Australian Open | A | A | A | Q3 | Q2 | 2R | Q3 | 0 / 1 | 1–1 | 50% | |
| French Open | A | A | A | Q1 | 1R | 1R | Q3 | 0 / 2 | 0–2 | 0% | |
| Wimbledon | A | A | A | 1R | 2R | 1R | Q2 | 0 / 3 | 1–3 | 25% | |
| US Open | A | A | 2R | Q2 | 2R | Q1 | 1R | 0 / 3 | 2–3 | 40% | |
| Win–loss | 0–0 | 0–0 | 1–1 | 0–1 | 2–3 | 1–3 | 0–1 | 0 / 9 | 4–9 | 31% | |
| WTA 1000 | |||||||||||
| Qatar Open | A | NMS | NMS | A | NMS | Q1 | Q2 | 0 / 0 | 0–0 | – | |
| Dubai | NMS | A | A | NMS | 1R | Q1 | A | 0 / 1 | 0–1 | 0% | |
| Indian Wells Open | A | A | A | Q1 | 1R | 1R | A | 0 / 2 | 0–2 | 0% | |
| Miami Open | A | A | A | A | Q1 | Q1 | 3R | 0 / 1 | 2–1 | 67% | |
| Madrid Open | A | A | A | A | 3R | Q1 | 3R | 0 / 2 | 4–2 | 67% | |
| Italian Open | A | A | A | A | Q2 | 1R | A | 0 / 1 | 0–1 | 0% | |
| Canadian Open | A | A | A | A | A | Q1 | 0 / 0 | 0–0 | – | ||
| Cincinnati Open | A | A | A | A | Q1 | A | 0 / 0 | 0–0 | – | ||
| Guadalajara Open | NH | A | A | NMS | 0 / 0 | 0–0 | – | ||||
| Wuhan Open | A | A | NH | A | 0 / 0 | 0–0 | – | ||||
| China Open | A | A | NH | Q1 | Q1 | 0 / 0 | 0–0 | – | |||
| Win–loss | 0–0 | 0–0 | 0–0 | 0–0 | 2–3 | 0–2 | 4–2 | 0 / 7 | 6–7 | 46% | |
| Career statistics | |||||||||||
| 2016 | 2017 | 2021 | 2022 | 2023 | 2024 | 2025 | SR | W–L | Win% | ||
| Tournaments | 1 | 2 | 2 | 4 | 14 | 12 | 2 | Career total: 37 | |||
| Titles | 0 | 0 | 0 | 0 | 0 | 0 | 0 | Career total: 0 | |||
| Finals | 0 | 0 | 0 | 0 | 1 | 0 | 0 | Career total: 1 | |||
| Hard win–loss | 0–0 | 0–1 | 1–2 | 0–1 | 11–9 | 3–5 | 2–1 | 0 / 19 | 17–19 | 47% | |
| Clay win–loss | 3–1 | 0–1 | 0–0 | 0–2 | 2–4 | 2–4 | 2–1 | 0 / 11 | 9–13 | 41% | |
| Grass win–loss | 0–0 | 0–0 | 0–0 | 0–1 | 3–3 | 0–3 | 0–0 | 0 / 7 | 3–7 | 30% | |
| Overall win–loss | 3–1 | 0–2 | 1–2 | 0–4 | 16–16 | 5–12 | 4–2 | 0 / 37 | 29–39 | 43% | |
| Win % | 75% | 0% | 33% | 0% | 50% | 29% | 67% | Career total: 43% | |||
| Year-end ranking | 322 | 439 | 162 | 132 | 65 | 149 | $971,795 | ||||
| Tournament | 2017 | 2021 | 2022 | 2023 | SR | W–L | Win% | |
| Grand Slam tournaments | ||||||||
| Australian Open | A | A | A | A | 0 / 0 | 0–0 | – | |
| French Open | A | A | A | 1R | 0 / 1 | 0–1 | 0% | |
| Wimbledon | A | A | A | 2R | 0 / 1 | 1–1 | 50% | |
| US Open | A | A | A | 0 / 0 | 0–0 | – | ||
| Win–loss | 0–0 | 0–0 | 0–0 | 1–2 | 0 / 2 | 1–2 | 33% | |
| National representation | ||||||||
| Billie Jean King Cup | A | RR | RR | RR | 0 / 2 | 2–2 | 50% | |
| Career statistics | ||||||||
| Tournaments | 1 | 0 | 0 | 3 | Career total: 4 | |||
| Overall win-loss | 0–1 | 1–0 | 1–1 | 1–6 | 0 / 4 | 3–8 | 27% | |
| Year-end ranking | 667 | 269 | 189 | 158 | ||||
| Legend |
| WTA 1000 |
| WTA 500 |
| WTA 250 (0–1) |
| Finals by surface |
| Hard (0–1) |
| Grass (0–0) |
| Clay (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Jan 2023 | Auckland Open, New Zealand | WTA 250 | Hard | Coco Gauff | 1–6, 1–6 |
| Result | W–L | Date | Tournament | Surface | Opponent | Score |
| Loss | 0–1 | Jul 2022 | Båstad Open, Sweden | Clay | Jang Su-jeong | 6–3, 3–6, 1–6 |
| Loss | 0–2 | Apr 2024 | Solgironès Open, Spain | Clay | María Lourdes Carlé | 6–3, 1–6, 2–6 |
| Loss | 0–3 | Apr 2025 | Catalonia Open, Spain | Clay | Dalma Gálfi | 3–6, 0–6 |
| Result | W–L | Date | Tournament | Surface | Partner | Opponents | Score |
| Win | 1–0 | Jun 2022 | Internacional de Valencia, Spain | Clay | Aliona Bolsova | Alexandra Panova Arantxa Rus | 6–0, 6–3 |
| Loss | 1–1 | Jun 2023 | Solgironès Open, Spain | Clay | Aliona Bolsova | Caroline Dolehide Diana Shnaider | 6–7(5–7), 3–6 |
| Legend |
| $100,000 tournaments (0–1) |
| $60,000 tournaments (2–0) |
| $25,000 tournaments (2–0) |
| $15,000 tournaments (2–5) |
| Finals by surface |
| Hard (3–1) |
| Clay (3–5) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Sep 2017 | ITF Madrid, Spain | 15,000 | Hard | Nuria Párrizas Díaz | 4–6, 6–4, 2–6 |
| Loss | 0–2 | Oct 2017 | ITF Riba-roja de Túria, Spain | 15,000 | Clay | Isabelle Wallace | 3–6, 3–6 |
| Win | 1–2 | Sep 2018 | ITF Badenweiler, Germany | 15,000 | Clay | Nina Stadler | 6–2, 7–5 |
| Loss | 1–3 | Jan 2019 | ITF Manacor, Spain | 15,000 | Clay | Ioana Loredana Roșca | 2–6, 0–6 |
| Win | 2–3 | Mar 2019 | ITF Amiens, France | 15,000 | Clay (i) | Oana Georgeta Simion | 6–0, 6–3 |
| Loss | 2–4 | Mar 2019 | ITF Gonesse, France | 15,000 | Clay (i) | Eléonora Molinaro | 2–6, 6–2, 4–6 |
| Loss | 2–5 | Mar 2020 | ITF Heraklion, Greece | 15,000 | Clay | Miriam Kolodziejová | 4–6, 4–6 |
| Win | 3–5 | May 2021 | ITF Platja d'Aro, Spain | 25,000 | Clay | Irene Burillo Escorihuela | 6–3, 3–6, 6–2 |
| Win | 4–5 | Jun 2021 | ITF Palma del Río, Spain | 25,000 | Hard | Lulu Sun | 6–3, 1–6, 7–6(7–4) |
| Win | 5–5 | Jul 2021 | Open Araba en Femenino, Spain | 60,000 | Hard | Ane Mintegi del Olmo | 7–6(7–3), 6–4 |
| Win | 6–5 | Oct 2022 | Hamburg Ladies & Gents Cup, Germany | 60,000 | Hard (i) | Ysaline Bonaventure | 6–4, 6–3 |
| Loss | 6–6 | Apr 2023 | Oeiras Ladies Open, Portugal | 100,000 | Clay | Danka Kovinić | 2–6, 2–6 |
| Legend |
| $100,000 tournaments (1–0) |
| $80,000 tournaments (1–0) |
| $60,000 tournaments (3–1) |
| $25,000 tournaments (0–1) |
| $15,000 tournaments (3–3) |
| Finals by surface |
| Hard (3–2) |
| Clay (5–3) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Apr 2017 | ITF Dijon, France | 15,000 | Hard (i) | Diāna Marcinkēviča | Victoria Muntean Anastasia Zarytska | 6–4, 6–3 |
| Loss | 1–1 | May 2017 | Wiesbaden Open, Germany | 25,000 | Clay | Diāna Marcinkēviča | Vivian Heisen Storm Sanders | 5–7, 7–5, [8–10] |
| Win | 2–1 | Jan 2019 | ITF Manacor, Spain | 15,000 | Clay | Yvonne Cavallé Reimers | Irina Cantos Siemers Júlia Payola | 6–4, 6–3 |
| Win | 3–1 | Feb 2019 | ITF Manacor, Spain | 15,000 | Clay | Claudia Hoste Ferrer | Rina Saigo Yukina Saigo | 7–5, 6–3 |
| Win | 4–1 | Jun 2019 | Bella Cup Toruń, Poland | 60,000 | Clay | Rebecca Šramková | Robin Anderson Anhelina Kalinina | 6–4, 3–6, [10–4] |
| Win | 5–1 | Sep 2019 | Open de Valencia, Spain | 60,000 | Clay | Irina Bara | Andrea Gámiz Seone Mendez | 6–4, 7–6(2) |
| Loss | 5–2 | Mar 2020 | ITF Heraklion, Greece | 15,000 | Clay | Ioana Gașpar | Tamara Čurović Fanny Östlund | 4–6, 5–7 |
| Loss | 5–3 | Mar 2021 | ITF Manacor, Spain | 15,000 | Hard | Ylena In-Albon | Ángela Fita Boluda Oksana Selekhmeteva | 2–6, 7–5, [8–10] |
| Loss | 5–4 | Apr 2021 | ITF Monastir, Tunisia | 15,000 | Hard | Daniela Vismane | Karola Bejenaru Ilona Georgiana Ghioroaie | 2–6, 0–6 |
| Win | 6–4 | Jul 2021 | Open Araba en Femenino, Spain | 60,000 | Hard | Olivia Gadecki | Celia Cerviño Ruiz Olivia Nicholls | 6–3, 6–3 |
| Win | 7–4 | Oct 2022 | ITF Les Franqueses del Vallès, Spain | 100,000 | Hard | Aliona Bolsova | Misaki Doi Beatrice Gumulya | 7–5, 1–6, [10–3] |
| Win | 8–4 | Nov 2022 | Open Villa de Madrid, Spain | 80,000 | Clay | Aliona Bolsova | Lea Bošković Daniela Vismane | 6–3, 6–3 |
| Loss | 8–5 | Feb 2025 | ITF Prague, Czech Republic | W75 | Hard (i) | Priscilla Hon | Jesika Malečková Miriam Škoch | 0–6, 2–6 |
| Result | Year | Tournament | Surface | Opponent | Score |
| Win | 2016 | French Open | Clay | Amanda Anisimova | 7–5, 7–5 |
| Loss | 2017 | Australian Open | Hard | Marta Kostyuk | 5–7, 6–1, 4–6 |
| Result | W–L | Opponent | Rank | Event | Surface | Round | Score | mw- Rank | H2H |
| 2021 | |||||||||
| Loss | 0–1 | Elina Svitolina | No. 5 | US Open, United States | Hard | 2R | 2–6, 5–7 | No. 231 | 0–1 |
| 2023 | |||||||||
| Loss | 0–2 | Coco Gauff | No. 7 | Auckland Open, New Zealand | Hard | F | 1–6, 1–6 | No. 130 | 0–2 |
| Loss | 0–3 | Maria Sakkari | No. 9 | Madrid Open, Spain | Clay | 3R | 6–3, 3–6, 3–6 | No. 74 | 0–1 |
| Loss | 0–4 | Coco Gauff | No. 6 | French Open, France | Clay | 1R | 6–3, 1–6, 2–6 | No. 71 | |
| Win | 1–4 | Maria Sakkari | No. 8 | US Open, United States | Hard | 1R | 6–4, 6–4 | No. 71 | |
| Result | Year | W–L | Tournament | Tier | Surface | Opponent | Rank | Rd | RMR |
| Win | 2013 | 1–0 | ITF Benicarlo, Spain | 25,000 | Clay | Ester Valles Pinol | n/a | Q1 | n/a |
| Win | 2015 | 2–0 | ITF Madrid, Spain | 10,000 | Hard | Yulia Almiron Solano (WC) | n/a | Q1 | n/a |
| Win | 2020 | 3–0 | ITF Heraklion, Greece | 15,000 | Clay | Gaia Squarcialupi | n/a | Q2 | 717 |
| Win | 2021 | 4–0 | ITF Madrid, Spain | 25,000 | Hard | Amanda Montes Khaghani | n/a | Q2 | 443 |
| Win | 2022 | 5–0 | Iași Open, Romania | WTA 125 | Clay | Olivia Tjandramulia (LL) | 413 | 1R | No. 751 |