Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| Davis Cup | 2021/09/18 15:55 | Guido Pella v Erik Arutiunian | 6-1,6-2 |
| Challenger Columbus | 2021/09/19 20:15 | Duckhee Lee v Evan Song | 3-6,6-7 |
| ITF M15 Monastir | 2021/06/30 10:35 | Omni Kumar v Duckhee Lee | 6-0,6-2 |
| ITF M15 Monastir | 2021/06/25 10:30 | Imanol L Morillo v Duckhee Lee | 7-5,7-6 |
| ITF M15 Monastir | 2021/06/24 10:10 | Oscar Weightman v Duckhee Lee | 3-6,7-6,3-6 |
| ITF M15 Monastir | 2021/06/22 12:15 | Andre Ghem v Duckhee Lee | 2-6,2-6 |
| ITF M15 Monastir | 2021/06/16 11:10 | Luca Giacomini v Duckhee Lee | 6-3,6-1 |
| ITF M15 Monastir | 2021/06/08 11:00 | Siddhant Banthia v Duckhee Lee | 6-3,2-6,6-4 |
| Challenger Oeiras | 2021/04/06 09:00 | Hugo Grenier v Duckhee Lee | 6-0,6-3 |