[245] Yosuke Watanuki 6-7,1-6 Thai-Son Kwiatkowski [228] 2021-11-04 20:00
Stadium: Court 9 Round: 26 Ground: Hardcourt indoor
Home History
| Challenger Charlottesville | 2021/11/02 14:00 | Yosuke Watanuki v Christopher Eubanks | 6-2,2-6,6-4 |
| Challenger Las Vegas | 2021/10/26 18:00 | Jason Kubler v Yosuke Watanuki | 6-7,6-0,7-6 |
| ATP Winston-Salem | 2021/08/24 21:15 | Yosuke Watanuki v Marton Fucsovics | 5-7,1-6 |
| ATP Winston-Salem | 2021/08/23 21:25 | Jaume Munar v Yosuke Watanuki | 6-3,3-6,0-6 |
| ATP Winston-Salem | 2021/08/22 18:00 | Alexei Popyrin v Yosuke Watanuki | 6-2,4-6,6-1 |
| ATP Winston-Salem | 2021/08/21 20:10 | Yunseong Chung v Yosuke Watanuki | 3-6,6-7 |
| ATP Atlanta | 2021/07/24 14:00 | Christopher O'Connell v Yosuke Watanuki | 7-5,6-4 |
| ATP Los Cabos | 2021/07/18 02:40 | Yosuke Watanuki v Luis Patino | 7-6,4-6,6-2 |
Away History
| Challenger Charlottesville | 2021/11/02 23:10 | Thai-Son Kwiatkowski v Blaz Rola | 7-6,2-6,7-5 |
| Challenger Las Vegas | 2021/10/27 20:00 | Thai-Son Kwiatkowski v Ernesto Escobedo | 5-7,2-6 |
| Challenger Las Vegas | 2021/10/25 20:55 | Jason Jung v Thai-Son Kwiatkowski | 5-7,2-6 |
| ATP Indian Wells | 2021/10/06 22:00 | Botic Van De Zandschulp v Thai-Son Kwiatkowski | 6-4,4-6,6-2 |
| ATP Indian Wells | 2021/10/06 00:40 | Thai-Son Kwiatkowski v Ernests Gulbis | 6-4,6-2 |
| Challenger Braga | 2021/09/22 12:10 | Andrea Arnaboldi v Thai-Son Kwiatkowski | 6-4,6-1 |
| Challenger Braga | 2021/09/21 13:00 | Thai-Son Kwiatkowski v Frederico Ferreira Silva | 7-5,6-3 |
| Challenger Szczecin | 2021/09/16 11:05 | Jesper De Jong v Thai-Son Kwiatkowski | 6-4,7-6 |