Stadium: Center Court Round: 27 Ground: Hardcourt outdoor
| ITF M15 Sharm El Sheikh | 2021/11/20 08:00 | Peter Fajta v Duckhee Lee | 6-3,6-4 |
| ITF M15 Sharm El Sheikh | 2021/11/19 08:00 | Chien Hsun Lo v Duckhee Lee | 2-6,1-6 |
| ITF M15 Sharm El Sheikh | 2021/11/18 09:50 | Neil Oberleitner v Duckhee Lee | 3-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/11/17 12:50 | Erik Arutiunian v Duckhee Lee | 2-6,0-6 |
| ITF M15 Sharm El Sheikh | 2021/11/10 12:50 | Daniel Little v Duckhee Lee | 7-6,7-6 |
| 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 Heraklion | 2021/11/16 07:00 | Uisung Park v Nikolay Nedelchev | 6-4,6-2 |
| ITF M15 Heraklion | 2021/11/15 08:00 | Uisung Park v Charles Tzicas | 6-2,6-3 |
| ITF M15 Heraklion | 2021/11/14 09:30 | Uisung Park v Pavlos Tsitsipas | 6-1,6-1 |
| ITF M15 Heraklion | 2021/11/09 08:30 | Matthew Romios v Uisung Park | 6-4,6-1 |
| ITF M15 Monastir | 2021/06/26 08:30 | Uisung Park v Luciano Darderi | 3-6,4-6 |
| ITF M15 Monastir | 2021/06/25 08:30 | Uisung Park v Moez Echargui | 6-4,6-2 |
| ITF M15 Monastir | 2021/06/24 08:30 | Rinky Hijikata v Uisung Park | 6-1,6-7,0-6 |
| ITF M15 Monastir | 2021/06/23 08:30 | Adam El Mihdawy v Uisung Park | 6-4,1-6,2-6 |