Stadium: Court 3 Round: 27 Ground: Hardcourt outdoor
| Challenger Chengdu | 2019/08/01 03:00 | Dayne Kelly v Ji Sung Nam | 6-7,3-6 |
| Challenger Charlottesville | 2021/10/31 18:00 | Malek Jaziri v Dayne Kelly | 6-1,4-6,6-1 |
| Challenger Las Vegas | 2021/10/27 18:00 | Dayne Kelly v Mikael Torpegaard | 2-6,3-6 |
| Challenger Las Vegas | 2021/10/26 18:00 | Dayne Kelly v Christopher Bulus | 6-3,6-2 |
| Challenger Las Vegas | 2021/10/25 18:00 | Dayne Kelly v Aidan Mchugh | 6-4,6-3 |
| Challenger Las Vegas | 2021/10/24 19:10 | Malek Jaziri v Dayne Kelly | 1-6,2-6 |
| Challenger Columbus | 2021/09/22 14:00 | Nicolas Mejia v Dayne Kelly | 6-4,0-6,6-2 |
| Challenger Cary | 2021/09/15 18:35 | Mitchell Krueger v Dayne Kelly | 6-4,6-4 |
| Challenger Cary | 2021/09/13 18:10 | Nicolas Mejia v Dayne Kelly | 4-6,4-6 |
| Challenger Columbus | 2021/09/22 14:00 | Ji Sung Nam v Alex Bolt | 6-7,4-6 |
| Challenger Columbus | 2021/09/21 14:00 | Yunseong Chung v Ji Sung Nam | 6-3,4-6,6-7 |
| Davis Cup | 2021/09/17 16:00 | Rubin Statham v Ji Sung Nam | 2-6,2-6 |
| ITF M15 Monastir | 2021/06/30 08:30 | Ji Sung Nam v Moez Echargui | 3-6,4-6 |
| ITF M15 Monastir | 2021/06/22 10:50 | Ji Sung Nam v Rinky Hijikata | 3-6,1-6 |
| ITF M15 Monastir | 2021/06/16 08:30 | Ji Sung Nam v Aidan Mayo | 6-4,3-6,2-6 |
| ITF M15 Monastir | 2021/06/11 08:30 | Ji Sung Nam v Jeremy Beale | 1-6,6-1,6-7 |
| ITF M15 Monastir | 2021/06/10 08:25 | Ji Sung Nam v Erik Crepaldi | 6-4,7-5 |