Stadion: Court 1 Round: 14 Ground: Hardcourt indoor
| Challenger - Gatineau - Qualifikation | 2018/07/16 16:30 | Justin Boulais v Yunseong Chung | 2-6,1-6 |
| ITF - M25 - Champaign | 2021/07/26 15:00 | Alexander Bernard v Justin Boulais | 7-5,6-2 |
| UTR Pro Tennis Series - Atlanta | 2021/07/16 14:00 | Justin Boulais v Andres Martin | 4-6,3-3 |
| UTR Pro Tennis Series - Atlanta | 2021/07/15 16:30 | Chase Ferguson v Justin Boulais | 0-6,2-5 |
| UTR Pro Tennis Series - Atlanta | 2021/07/14 16:30 | Juan Pablo Cenoz v Justin Boulais | 4-6,4-5 |
| UTR Pro Tennis Series - Atlanta | 2021/07/13 18:00 | Justin Boulais v William Cooksey | 6-2,7-6 |
| UTR Pro Tennis Series - Nevada | 2021/07/03 15:00 | Nicolas Barrientos v Justin Boulais | 4-6,6-3,5-4 |
| UTR Pro Tennis Series - Nevada | 2021/07/02 16:30 | Justin Boulais v Michael Andre | 6-4,6-4 |
| UTR Pro Tennis Series - Nevada | 2021/07/01 16:30 | Justin Boulais v Jordan Sauer | 7-5,5-4 |
| ATP - Winston-Salem | 2021/08/21 20:10 | Yunseong Chung v Yosuke Watanuki | 3-6,6-7 |
| ITF - M25 - Decatur | 2021/08/06 17:10 | Yunseong Chung v Eliot Spizzirri | 4-6,4-6 |
| ITF - M25 - Decatur | 2021/08/05 17:55 | Jumpei Yamasaki v Yunseong Chung | 2-6,2-6 |
| ITF - M25 - Decatur | 2021/08/04 18:45 | Yunseong Chung v Nathan Ponwith | 6-2,6-1 |
| ITF - M25 - Champaign | 2021/07/28 17:25 | Yunseong Chung v Ben Shelton | 5-7,0-6 |
| Challenger - Nur-Sultan | 2021/07/19 10:05 | Yunseong Chung v Hugo Grenier | 7-6,3-6,1-6 |
| Challenger - Nur-Sultan | 2021/07/15 06:00 | Roman Safiullin v Yunseong Chung | 6-3,6-4 |
| Challenger - Nur-Sultan | 2021/07/13 07:15 | Yunseong Chung v Yan Bondarevskiy | 6-3,6-4 |