Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Yanagawa | 2023/12/31 01:30 | Duckhee Lee v Sanhui Shin | 3-6,4-6 |
| ITF M15 Yanagawa | 2023/12/30 01:00 | Duckhee Lee v Jumpei Yamasaki | 6-1,3-6,6-1 |
| ITF M15 Yanagawa | 2023/12/29 01:00 | Keisuke Saitoh v Duckhee Lee | 3-6,5-7 |
| ITF M15 Yanagawa | 2023/12/28 02:40 | Ko Suzuki v Duckhee Lee | 1-6,2-6 |
| ITF M15 Yanagawa | 2023/12/27 00:30 | Seita Watanabe v Duckhee Lee | 1-6,6-7 |
| ITF M15 Kuala Lumpur | 2023/11/29 01:30 | Duckhee Lee v Seungmin Park | 6-4,2-6,6-1 |
| ITF M15 Ipoh Perak | 2023/11/24 02:00 | Alexey Zakharov v Duckhee Lee | 6-4,6-4 |
| ITF M15 Ipoh Perak | 2023/11/23 02:30 | Andrea Bacaloni v Duckhee Lee | 3-6,3-6 |
| ITF M25 Changwon | 2023/06/16 01:00 | Chan-Yeong Oh v Dominik Palan | 3-6,0-6 |
| ITF M25 Changwon | 2023/06/15 01:00 | Naoki Tajima v Chan-Yeong Oh | 1-6,3-6 |
| ITF M25 Changwon | 2023/06/14 04:00 | Hong Chung v Chan-Yeong Oh | 4-6,5-7 |
| ITF M25 Changwon | 2023/06/12 08:20 | Chan-Yeong Oh v Dae Han Kim | 5-7,6-2,10-4 |
| ITF M25 Changwon | 2023/06/12 04:55 | Chan-Yeong Oh v Chan Hee Han | 6-3,6-2 |
| ITF M25 Changwon | 2023/06/11 05:35 | Seonyong Han v Chan-Yeong Oh | 3-6,2-6 |
| ITF M25 Daegu | 2023/06/07 04:40 | Chan-Yeong Oh v Hong Chung | 2-6,4-6 |
| ITF M25 Daegu | 2023/06/05 01:00 | Issei Okamura v Chan-Yeong Oh | 1-6,6-4,7-10 |