# Colin Sinclair (tennis)

Colin Sinclair (born December 19, 1994) is an American tennis player representing the Northern Mariana Islands.
He achieved a career best singles ranking of world No. 340 on 18 September 2023, and a career high doubles ranking of world No. 200 on 10 April 2023. He has won four doubles titles on the ATP Challenger Tour. Additionally, he has won three singles and eight doubles titles on the ITF Tour.
He represents the Northern Mariana Islands in Davis Cup as part of the Pacific Oceania team since 2017 and has a career record of 18–5 (13–3 in singles, 5–2 in doubles) in the competition.

## ATP Challenger and ITF Tour finals
### Singles: 12 (3–9)

* Legend
* ATP Challenger Tour (0–0)
* ITF Futures/World Tennis Tour (3–9)
* Finals by surface
* Hard (2–7)
* Clay (1–2)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Aug 2018 | Belgium F9, Huy | Futures | Clay | Jan Choinski | 6–3, 6–7$^{(0–7)}$, 3–6 |
| Loss | 0–2 | Sep 2018 | Belgium F10, Damme | Futures | Clay | Michael Geerts | 3–6, 3–6 |
| Loss | 0–3 | Sep 2018 | Tunisia F31, Monastir | Futures | Hard | Gabriel Petit | 6–7$^{(5–7)}$, 6–7$^{(4–7)}$ |
| Loss | 0–4 | Oct 2018 | Australia F7, Brisbane | Futures | Hard | Evan Hoyt | 4–6, 6–7$^{(5–7)}$ |
| Loss | 0–5 | Oct 2018 | Australia F8, Toowoomba | Futures | Hard | Maverick Banes | 4–6, 2–6 |
| Win | 1–5 | Feb 2019 | M15 Claremont, United States | World Tennis Tour | Hard | Lucas Poullain | 6–3, 7–6$^{(7–3)}$ |
| Loss | 1–6 | Nov 2019 | M15 Cancún, Mexico | World Tennis Tour | Hard | João Lucas Reis da Silva | 2–6, 4–6 |
| Win | 2–6 | Nov 2021 | M15 Guatemala City, Guatemala | World Tennis Tour | Hard | Marco Brugnerotto | 6–1, 5–7, 6–4 |
| Loss | 2–7 | May 2022 | M15 Cairo, Egypt | World Tennis Tour | Clay | Li Tu | 4–6, 6–3, 3–6 |
| Loss | 2–8 | Oct 2022 | M25 Cairns, Australia | World Tennis Tour | Hard | Alex Bolt | 3–6, 2–6 |
| Win | 3–8 | Jun 2023 | M15 Rancho Santa Fe, USA | World Tennis Tour | Hard | Jaimee Floyd Angele | 6–3, 6–2 |
| Loss | 3–9 | Sep 2024 | M15 Hong Kong, Hong Kong | World Tennis Tour | Hard | Chris Rodesch | 4–6, 6–7$^{(3–7)}$ |

### Doubles: 19 (12–7)

* Legend
* ATP Challenger Tour (4–0)
* ITF Tour (8–7)
* Finals by surface
* Hard (7–3)
* Clay (5–4)
* Grass (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Aug 2017 | Belgium F8, Eupen | Futures | Clay | Charles Broom | Tom Schonenberg Colin Van Beem | 4–6, 6–1, [10–5] |
| Loss | 1–1 | Aug 2018 | Belgium F9, Huy | Futures | Clay | Luke Jacob Gamble | Dan Added Romain Barbosa | 4–6, 5–7 |
| Loss | 1–2 | Mar 2021 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Vladislav Melnic | Samuele Pieri Daniele Capecchi | 7–6$^{(8–6)}$, 4–6, [4–10] |
| Win | 2–2 | Mar 2021 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Vladislav Melnic | Kazuma Kawachi Evan Zhu | 6–3, 4–6, [10–6] |
| Loss | 2–3 | Sep 2021 | M25 Říčany, Czech Republic | World Tennis Tour | Clay | Alexander Donski | Toby Alex Kodat Adam Pavlásek | 3–6, 5–7 |
| Loss | 2–4 | Sep 2021 | M25 Eupen, Belgium | World Tennis Tour | Clay | Benjamin Dhoe | Niklas Schell Kai Wehnelt | 6–7$^{(3–7)}$, 3–6 |
| Loss | 2–5 | Oct 2021 | M15 Tallahassee, United States | World Tennis Tour | Hard | Thomas Fancutt | Liam Draxl John McNally | 2–6, 3–6 |
| Loss | 2–6 | Feb 2022 | M15 Oberhaching, Germany | World Tennis Tour | Hard | Edan Leshem | Petr Nouza Giovanni Oradini | 6–3, 3–6, [11–13] |
| Loss | 2–7 | Apr 2022 | M15 Cairo, Egypt | World Tennis Tour | Clay | Francis Casey Alcantara | Lorenzo Joaquin Rodriguez Ilya Rudiukov | 5–7, 4–6 |
| Win | 3–7 | May 2022 | M25 Cairo, Egypt | World Tennis Tour | Clay | Francis Casey Alcantara | Denis Klok Ilya Rudiukov | 6–3, 6–3 |
| Win | 4–7 | May 2022 | M15 Cairo, Egypt | World Tennis Tour | Clay | Tristan Schoolkate | David Pichler Volodymyr Uzhylovskyi | 6–1, 7–5 |
| Win | 5–7 | Sep 2022 | M25 Darwin, Australia | World Tennis Tour | Hard | Kyle Seelig | Tai Sach Zaharije-Zak Talic | 6–4, 6–4 |
| Win | 6–7 | Oct 2022 | M25 Cairns, Australia | World Tennis Tour | Hard | Kyle Seelig | James McCabe Adam Walton | 6–4, 6–2 |
| Win | 7–7 | Jan 2023 | Nouméa, New Caledonia | Challenger | Hard | Rubin Statham | Toshihide Matsui Kaito Uesugi | 6–4, 6–3 |
| Win | 9–7 | Mar 2023 | M25 Canberra, Australia | World Tennis Tour | Clay | Zaharije-Zak Talic | Blake Bayldon Jordan Smith | 7–5, 6–3 |
| Win | 9–7 | Apr 2023 | San Luis Potosí, Mexico | Challenger | Clay | Adam Walton | Benjamin Lock Rubin Statham | 5–7, 6–3, [10–5] |
| Win | 10–7 | Jan 2024 | Nouméa, New Caledonia | Challenger | Hard | Rubin Statham | Toshihide Matsui Calum Puttergill | 7–5, 6–2 |
| Win | 11–7 | Nov 2024 | M25 Brisbane, Australia | World Tennis Tour | Hard | Brandon Walkin | Joshua Charlton Emile Hudd | 7–6$^{(7–3)}$, 6–3 |
| Win | 12–7 | Jan 2025 | Nouméa, New Caledonia | Challenger | Hard | Blake Bayldon | Ryuki Matsuda Ryotaro Taguchi | 6–3, 7–5 |