.jpg) Kwiatkowski at the2022 Wimbledon Championships | |
| Country (sports) |  United States |
|---|---|
| Residence | Charlottesville, Virginia |
| Born | (1995-02-13)February 13, 1995 (age 31) |
| Height | 6 ft 2 in (1.88 m) |
| Turned pro | 2017 |
| Retired | October 2025 |
| Plays | Right-handed (two-handed backhand) |
| College | University of Virginia |
| Prize money | $ 538,880 |
| Singles | |
| Career record | 0–7 (Grand Slam,ATP Tour level, andDavis Cup) |
| Career titles | 0 |
| Highest ranking | No. 181 (February 3, 2020) |
| Grand Slam singles results | |
| Australian Open | Q1 (2020,2021) |
| French Open | Q2 (2021) |
| Wimbledon | Q1 (2021,2022) |
| US Open | 1R (2017,2020) |
| Doubles | |
| Career record | 0–3 |
| Career titles | 0 |
| Highest ranking | No. 232 (July 29, 2019) |
| Grand Slam doubles results | |
| US Open | 1R (2019) |
| Mixed doubles | |
| Grand Slam mixed doubles results | |
| US Open | 2R (2024) |
| Last updated on: 1 September 2025. | |
Thai-Son Kwiatkowski (born February 13, 1995) is a formerVietnamese Americantennis player. He played collegiately for theVirginia Cavaliers. On 29 May 2017, Kwiatkowski won theNCAA Men's Singles Championship.[1][2]
Coming out of high school, he was the nation's top recruit.[3] Kwiatkowski was on three national championship teams during his time at Virginia. As a sophomore, he tied the school's single season wins record, going 44-8 during the season. On September 11, 2016, Kwiatkowski won the American Collegiate Invitational, which earned him a wild card into the qualifying tournament for the 2017US Open.[4] After his senior season, he was named first-team all-ACC.[5] Kwiatkowski won the singles title at the2017 NCAA Men's Singles Championship, defeatingWilliam Blumberg in the final.[6]
Other notable college achievements:[7]
After winning the NCAA singles championship, Kwiatkowski was awarded a wildcard into the main draw of the2017 US Open.[1] He faced the 23rd seedMischa Zverev in the first round, losing in five sets.[8][9]
He won his maiden Challenger title inNewport Beach in 2020.[10][11][12]He was also awarded a wildcard into the main draw of the2020 US Open,[13] where he lost in the first round toKwon Soon-woo in four sets.
In August 2024, he announced his retirement after playing his last singles match at the2024 Winston-Salem Open[14][15] but in August 2025, he was accepted into the tournament to play in the qualifying competition using protected ranking.
Thai-Son's parents are Wendi Le and Tim Kwiatkowski. He has a younger brother named Liem. His parents are both University of Virginia alumni. Kwiatkowski is ofVietnamese andPolish descent.[16] Kwiatkowski majored in commerce.[3]
On 23 February 2021, Thai-Son Kwiatkowski successfully obtained Vietnamese citizenship in order to play for Vietnam's national tennis team in upcoming tournaments.[17] He immediately became the most accomplished tennis player to represent Vietnam after he obtained the citizenship and planned to represent the country in international competition.[18] He is playing for Hung Thinh – Ho Chi Minh City team since October 2019.[19]
Thai-Son is not the first foreign-born tennis player to be recruited by a Vietnamese domestic tennis team.Daniel Nguyen a Vietnamese American tennis player is playing for the Hai Dang - Tay Ninh team and obtained Vietnamese citizenship in 2019.[20][21]
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| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
|---|---|---|---|---|---|---|---|
| Win | 1–0 | Dec 2016 | Puerto Rico F1,Mayagüez | Futures | Hard | Alexios Halebian | 6–1, 6–4 |
| Win | 2–0 | Oct 2017 | USA F33,Houston | Futures | Hard | Sebastian Korda | 6–2, 6–2 |
| Win | 3–0 | May 2018 | Singapore F1,Singapore | Futures | Hard |  Soichiro Moritani | 6–2, 6–2 |
| Win | 4–0 | Jun 2018 | Canada F3,Calgary | Futures | Hard | Paul Oosterbaan | 6–4, 6–3 |
| Win | 5–0 | Feb 2020 | Newport Beach, USA | Challenger | Hard |  Daniel Elahi Galán | 6–4, 6–1 |
| Win | 6–0 | Apr 2023 | M15Sunrise, USA | World Tennis Tour | Clay | Tristan McCormick | 6–4, 7–6(7–5) |
| Loss | 6–1 | Oct 2023 | M15Las Vegas, USA | World Tennis Tour | Hard |  Bernard Tomic | 1–6, 6–4, 2–6 |
| Win | 7–1 | Mar 2024 | M25Santo Domingo, Dominican Republic | World Tennis Tour | Hard |  Nick Hardt | 6–4, 6–4 |
| Win | 8–1 | Mar 2024 | M25 Santo Domingo, Dominican Republic | World Tennis Tour | Hard |  Andrés Andrade | 6–4, 7–6(7–3) |
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| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
|---|---|---|---|---|---|---|---|---|
| Win | 1–0 | Jun 2016 | USA F17,Charlottesville | Futures | Hard | Mac Styslinger | Greg Jones José Statham | 6–4, 6–1 |
| Win | 2–0 | Jun 2016 | USA F18,Winston-Salem | Futures | Hard | Jared Hiltzik | Austin Smith Dennis Uspensky | 6–4, 6–2 |
| Loss | 2–1 | Aug 2016 | Finland F1,Kaarina | Futures | Clay | José Statham |  Herkko Pöllänen Mikael Torpegaard | 7–6(7–4), 3–6, [6–10] |
| Loss | 2–2 | Dec 2016 | Puerto Rico F1,Mayagüez | Futures | Hard | Quinton Vega |  Nebojša Perić Ilija Vučić | 1–6, 3–6 |
| Win | 3–2 | Mar 2017 | France F5,Toulouse | Futures | Hard (i) |  Fabien Reboul |  Niels DeseinYannick Jankovits | 6–3, 7–6(7–4) |
| Loss | 3–3 | Jun 2017 | USA F20,Rochester | Futures | Clay | Luca Corinteli |  Hugo Di Feo Mikael Torpegaard | 6–7(5–7), 4–6 |
| Loss | 3–4 | Oct 2017 | USA F33,Houston | Futures | Hard | Austin Krajicek | Aron Hiltzik Dennis Nevolo | 6–7(3–7), 3–6 |
| Loss | 3–5 | Dec 2017 | Mexico F7,Metepec | Futures | Hard | John Paul Fruttero | Gonzalo Escobar Manuel Sánchez | 3–6, 3–6 |
| Win | 4–5 | Jul 2018 | Canada F4,Kelowna | Futures | Hard |  Julian Bradley | Charlie Emhardt Samuel Shropshire | 7–6(7–5), 7–5 |
| Loss | 4–6 | Apr 2019 | Tallahassee, USA | Challenger | Clay | Noah Rubin |  Roberto Maytín Fernando Romboli | 2–6, 6–4, [7–10] |
| Loss | 4–7 | Jul 2019 | Winnetka, USA | Challenger | Hard | Christopher Eubanks | JC AragoneBradley Klahn | 5–7, 4–6 |
| Win | 5–7 | Mar 2020 | Indian Wells, USA | Challenger | Hard | Denis Kudla | Sebastian KordaMitchell Krueger | 6–3, 2–6, [10–6] |
| Loss | 5–8 | Oct 2023 | Charlottesville, USA | Challenger | Hard (i) | Denis Kudla | John-Patrick Smith Sem Verbeek | 6–3, 3–6, [5–10] |
| Loss | 5–9 | Jan 2024 | Indian Wells, USA | Challenger | Hard | Alex Lawson | Ryan SeggermanPatrik Trhac | 2–6, 6–7(3–7) |
