Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| ITF M25 Daegu | 2023/06/06 03:10 | Duckhee Lee v Jumpei Yamasaki | 1-6,6-4,4-6 |
| ITF M25 Daegu | 2023/06/06 03:10 | Duckhee Lee v Jumpei Yamasaki | 1-6,6-4,4-6 |
| ITF M25 Jakarta | 2023/06/01 03:55 | Fitriadi M Rifqi v Duckhee Lee | 6-0,3-6,6-1 |
| Challenger Busan | 2023/05/07 05:05 | Duckhee Lee v Hiroki Moriya | 6-7,0-6 |
| Challenger Seoul | 2023/04/26 05:10 | James Duckworth v Duckhee Lee | 7-6,1-6,6-1 |
| Challenger Seoul | 2023/04/24 05:05 | Luke Saville v Duckhee Lee | 3-6,3-6 |
| Challenger Seoul | 2023/04/23 06:00 | Duckhee Lee v Jason Jung | 7-6,6-4 |
| ITF M25 Jakarta | 2023/04/22 03:55 | Jeamoon Lee v Duckhee Lee | 6-2,6-2 |
| ITF M25 Jakarta | 2023/04/21 02:30 | Duckhee Lee v Tristan Schoolkate | 6-3,4-6,6-0 |
| ITF M25 Daegu | 2023/06/09 02:55 | Jumpei Yamasaki v Dominik Palan | 4-6,2-6 |
| ITF M25 Daegu | 2023/06/06 03:10 | Duckhee Lee v Jumpei Yamasaki | 1-6,6-4,4-6 |
| ITF M15 Karuizawa | 2023/06/03 03:30 | Sanhui Shin v Jumpei Yamasaki | 6-3,7-6 |
| ITF M15 Karuizawa | 2023/06/01 02:40 | Jumpei Yamasaki v Takuya Kumasaka | 6-3,6-2 |
| ITF M15 Karuizawa | 2023/05/31 01:00 | Jumpei Yamasaki v Seita Watanabe | 6-4,6-4 |
| ITF M15 Karuizawa | 2023/05/30 02:00 | Jumpei Yamasaki v Daiki Yoshimura | 6-2,6-2 |
| ITF M15 Heraklion | 2022/10/14 08:50 | Simone Roncalli v Jumpei Yamasaki | 6-4,6-3 |
| ITF M15 Heraklion | 2022/10/13 08:40 | Thantub Suksumrarn v Jumpei Yamasaki | 6-7,2-6 |