Topzle Updated: Wikipedia source
Billy Harris (born 25 January 1995) is a British tennis player. He has a career-high ATP singles ranking of world No. 101 achieved on 9 September 2024. He is the current British No. 4 singles player. He also has a career-high doubles ranking of No. 265 achieved on 12 February 2024.
| W | F | SF | QF | | RR | Q# | DNQ | A | NH |
| Tournament | 2022 | 2023 | 2024 | 2025 | SR | W–L |
| Grand Slam tournaments | ||||||
| Australian Open | A | A | Q2 | Q3 | 0 / 0 | 0–0 |
| French Open | A | A | Q3 | Q1 | 0 / 0 | 0–0 |
| Wimbledon | Q1 | Q3 | 1R | 2R | 0 / 2 | 1–2 |
| US Open | A | A | Q3 | 1R | 0 / 1 | 0–1 |
| Win–loss | 0–0 | 0–0 | 0–1 | 1–2 | 0 / 3 | 1–3 |
| National representation | ||||||
| Davis Cup | A | A | RR | WG1 | 0 / 1 | 1–2 |
| ATP Masters 1000 | ||||||
| Indian Wells Masters | A | A | A | Q1 | 0 / 0 | 0–0 |
| Miami Open | A | A | A | 1R | 0 / 1 | 0–1 |
| Monte-Carlo Masters | A | A | A | A | 0 / 0 | 0–0 |
| Madrid Open | A | A | A | Q1 | 0 / 0 | 0-0 |
| Italian Open | A | A | A | Q1 | 0 / 0 | 0–0 |
| Canadian Open | A | A | Q2 | A | 0 / 0 | 0–0 |
| Cincinnati Open | A | A | A | A | 0 / 0 | 0–0 |
| Shanghai Masters | A | A | 1R | Q2 | 0 / 1 | 0–1 |
| Paris Masters | A | A | A | A | 0 / 0 | 0–0 |
| Win–loss | 0–0 | 0–0 | 0–1 | 0–1 | 0 / 2 | 0–2 |
| Career statistics | ||||||
| Tournaments | 0 | 1 | 6 | 8 | 15 | |
| Overall win–loss | 0–0 | 1–1 | 7–6 | 3–13 | 11–20 | |
| Year-end ranking | 355 | 199 | 125 | |||
| Legend |
| ATP Challengers (1–2) |
| ITF Futures/World Tennis Tour (5–6) |
| Titles by surface |
| Hard (3–3) |
| Clay (3–4) |
| Grass (0–1) |
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Dec 2020 | M15 Antalya, Turkey | World Tennis Tour | Clay | Georgii Kravchenko | 2–6, 3–6 |
| Win | 1–1 | Oct 2021 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Kai Wehnelt | 6–4, 6–1 |
| Loss | 1–2 | Oct 2021 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Yan Bondarevskiy | 2–6, 3–6 |
| Win | 2–2 | Oct 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Felix Gill | 6–3, 1–6, 7–5 |
| Loss | 2–3 | Nov 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Daniel Michalski | 6–2, 1–6, 3–6 |
| Win | 3–3 | Dec 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Arthur Fils | 6–2, 1–6, 6–4 |
| Win | 4–3 | Dec 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Cayetano March | 6–1, 6–4 |
| Loss | 4–4 | Dec 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Dragoș Nicolae Mădăraș | 5–7, 1–6 |
| Loss | 4–5 | Mar 2022 | M25 Antalya, Turkey | World Tennis Tour | Clay | Oleksii Krutykh | 4–6, 6–4, 2–6 |
| Win | 5–5 | May 2022 | M25 Nottingham, United Kingdom | World Tennis Tour | Hard | Edan Leshem | 6–4, 6–3 |
| Loss | 5–6 | Mar 2023 | Les Franqueses del Vallès, Spain | Challenger | Hard | Hugo Grenier | 6–3, 1–6, 6–7(3–7) |
| Loss | 5–7 | Jul 2023 | M25 Nottingham, United Kingdom | World Tennis Tour | Grass | Toby Samuel | 4–6, 4–6 |
| Loss | 5–8 | Feb 2025 | New Delhi, India | Challenger | Hard | Kyrian Jacquet | 4–6, 2–6 |
| Win | 6–8 | Sep 2025 | Cassis Open, France | Challenger | Hard | Daniil Glinka | 3–6, 7–5, 6–3 |
| Legend |
| ATP Challengers (1–0) |
| ITF Futures/World Tennis Tour (7–6) |
| Titles by surface |
| Hard (4–3) |
| Clay (4–3) |
| Grass (0–0) |
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Aug 2015 | Belgium F9, Eupen | Futures | Clay | Evan Hoyt | Sander Gillé Joran Vliegen | 7–6(7–5), 6–3 |
| Win | 2–0 | Nov 2015 | Great Britain F10, Tipton | Futures | Hard | Evan Hoyt | Lloyd Glasspool Joshua Ward-Hibbert | 4–6, 6–3, [11–9] |
| Loss | 2–1 | Sep 2016 | Belgium F12, Middelkerke | Futures | Clay | Jakob Sude | Adam Taylor Jason Taylor | 0–6, 2–6 |
| Loss | 2–2 | Oct 2016 | Great Britain F4, Loughborough | Futures | Hard | Mateusz Terczyński | Scott Clayton Jonny O'Mara | 3–6, 2–6 |
| Win | 3–2 | Sep 2017 | Belgium F12, Middelkerke | Futures | Clay | Patrik Niklas-Salminen | Michiel de Krom Stephan Fransen | 6–7(7–9), 7–5, [10–3] |
| Loss | 3–3 | Mar 2018 | Italy F2, Santa Margherita di Pula | Futures | Clay | Maciej Rajski | Gianluca Di Nicola Walter Trusendi | 5–7, 3–6 |
| Loss | 3–4 | Oct 2019 | M25 Tây Ninh, Vietnam | World Tennis Tour | Hard | Samuel Beren | Rio Noguchi Alexey Zakharov | 7–6(7–5), 4–6, [4–10] |
| Win | 4–4 | Mar 2020 | M15 Vale Do Lobo, Portugal | World Tennis Tour | Hard | Peter Bothwell | Albert Roglan Benjamín Winter López | 6–3, 6–4 |
| Win | 5–4 | Jan 2021 | M15 Antalya, Turkey | World Tennis Tour | Clay | Yan Sabanin | Plamen Milushev Simeon Terziev | 7–6(7–5), 6–0 |
| Loss | 5–5 | May 2021 | M15 Heraklion, Greece | World Tennis Tour | Hard | George Houghton | Julian Cash Reese Stalder | 7–6(8–6), 0–6, [8–10] |
| Loss | 5–6 | Jul 2021 | M15 L'Aquila, Italy | World Tennis Tour | Clay | Luciano Darderi | Juan Ignacio Galarza Tomás Lipovšek Puches | 3–6, 1–6 |
| Win | 6–6 | Jul 2021 | M15 Perugia, Italy | World Tennis Tour | Clay | Luciano Darderi | Juan Ignacio Galarza Tomás Lipovšek Puches | Walkover |
| Win | 7–6 | Oct 2021 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Alexander Donski | Yan Bondarevskiy Kai Wehnelt | 6–1, 6–4 |
| Win | 8–6 | Jul 2022 | Winnipeg, Canada | Challenger | Hard | Kelsey Stevenson | Max Schnur John-Patrick Smith | 2–6, 7–6(11–9), [10–8] |