Stadium: Court 4 Round: 29 Ground: Hardcourt outdoor
| Challenger Columbus | 2021/09/21 14:00 | Yunseong Chung v Ji Sung Nam | 6-3,4-6,6-7 |
| Challenger Columbus | 2021/09/20 14:00 | Alexis Galarneau v Yunseong Chung | 4-6,4-6 |
| Challenger Columbus | 2021/09/19 18:35 | Justin Boulais v Yunseong Chung | 6-7,3-6 |
| 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 |
| ATP Paris | 2021/10/30 18:55 | Dominik Koepfer v Harold Mayot | 3-6,6-0,7-5 |
| ITF M25 Sarreguemines | 2021/10/28 15:05 | Harold Mayot v Gabriel Decamps | 6-4,4-6,4-6 |
| ITF M25 Sarreguemines | 2021/10/26 15:30 | Harold Mayot v Blake Ellis | 6-4,7-6 |
| ITF M25 Toulouse | 2021/10/22 16:15 | Luca Van Assche v Harold Mayot | 6-0,6-4 |
| ITF M25 Toulouse | 2021/10/21 17:30 | Valentin Royer v Harold Mayot | 6-7,6-7 |
| ITF M25 Toulouse | 2021/10/20 13:45 | Hugo Pierre v Harold Mayot | 3-6,3-6 |
| ITF M25 Rodez | 2021/10/12 07:55 | Martin Damm v Harold Mayot | 7-6,3-6,6-3 |
| Challenger Mouilleron le Captif | 2021/10/07 09:00 | Harold Mayot v Jiri Vesely | 2-6,4-6 |