Cooper Williams (born June 17, 2005) is an American tennis player. He has a career-high ATP singles ranking of world No. 688, achieved on 8 August 2025 and a doubles ranking of No. 516, achieved on 12 June 2023.
Williams won the boys' doubles title alongside compatriot Learner Tien at the 2023 Australian Open in January 2023.[1][2]
Born and raised in New York City, Williams attended St. Bernard's School on the Upper East Side from Kindergarten to seventh grade. He graduated from Dwight School Global in June 2023. Williams relocated to Boca Raton, Florida during the Covid pandemic, where he works with fitness coach, Richard Woodruff.[3][4]
Alongside partner Learner Tien, Williams won the junior Australian Open doubles in January 2023, defeating Alexander Blockx and João Fonseca in the final 6–4, 6–4.[5][6]
In August 2025, he made his main draw grand slam debut alongside Theodore Winegar at the 2025 US Open, having received the US collegiate wildcard into the men's doubles having won the inaugural American Collegiate Wildcard Playoff in Orlando.[7] In the first round they defeated Czech pairing Petr Nouza and Patrik Rikl in straight sets before facing previous finalists and the No. 4 seeds Kevin Krawietz and Tim Puetz.[8][9]
Williams played his Freshman season of college tennis at Harvard, where he earned All-America singles status and 2024 NCAA Rookie of the Year. He led the Crimson to its highest NCAA ranking in program history, #6 in the nation. Williams now plays for Duke University.
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| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Win | 1–0 | Jun 2025 | M15 Monastir, Tunisia | WTT | Hard |  Marcus Walters
|
6–3, 6–1 |
| Win | 2–0 | Jun 2025 | M15 Monastir, Tunisia | WTT | Hard |  Luca Potenza
|
6–3, 7–5 |
|
|
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|---|
| Loss | 0–1 | Jul 2022 | M25 Edwardsville, US | WTT | Hard |  Kweisi Kenyatte
|
 Makoto Ochi Seita Watanabe
|
6–7(1–7), 3–6 |
| Loss | 0–2 | Aug 2022 | M15 Memphis, US | WTT | Hard | Alex Michelsen
|
Millen Hurrion Finn Reynolds
|
0–6, 1–6 |
| Win | 1–2 | Sep 2022 | M15 Fayetteville, US | WTT | Hard |  Alessio Basile
|
 Adrien Burdet Melvin Manuel
|
6–4, 6–3 |
| Win | 2–2 | Mar 2023 | M25 Calabasas, US | WTT | Hard |  Edward Winter
|
Rohan Murali Elijah Strode
|
6–2, 6–3 |
| Win | 3–2 | Oct 2024 | M15 Winston-Salem, US | WTT | Hard | Daniel Milavsky
|
Ryan Fishback Henry Lieberman
|
6–1, 6–1 |
| Win | 4–2 | Jul 2025 | M15 Monastir, Tunisia | WTT | Hard | Matthew Rankin
|
 Daniil Bogatov Evgenii Tiurnev
|
6–3, 5–7, [10–5] |
| Result | Year | Tournament | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|
| Win | 2023 | Australian Open | Hard | Learner Tien
|
Alexander Blockx João Fonseca
|
6–4, 6–4 |
