Ground: Hardcourt outdoor
| ITF M25 Changwon | 2024/06/18 01:00 | Masamichi Imamura v Yeonsu Jeong | 6-3,6-3 |
| ITF M15 Anseong | 2024/06/12 05:00 | Yeonsu Jeong v Chan-Yeong Oh | 1-6,7-6,3-6 |
| ITF M25 Anseong | 2023/06/20 02:00 | Yeonsu Jeong v Woobin Shin | 2-6,4-6 |
| ITF M25 Changwon | 2023/06/14 03:50 | Yeonsu Jeong v Jeamoon Lee | 6-7,3-6 |
| ITF M25 Anning | 2025/04/29 04:00 | Duckhee Lee v Xing Dao Chen | 6-7,2-6 |
| Challenger Gwangju | 2025/04/20 06:40 | Yan Bai v Duckhee Lee | 6-3,7-6 |
| Challenger Busan | 2025/04/14 02:00 | Ilia Simakin v Duckhee Lee | 6-2,6-2 |
| Challenger Busan | 2025/04/13 04:00 | Duckhee Lee v Kaichi Uchida | 6-4,6-4 |
| ITF M15 Nonthaburi | 2025/03/27 03:00 | Mitsuki Wei Kang Leong v Duckhee Lee | 6-4,6-2 |
| ITF M15 Nonthaburi | 2025/03/26 06:00 | Renta Tokuda v Duckhee Lee | 3-6,3-6 |
| ITF M15 Nonthaburi | 2025/03/18 03:00 | Duckhee Lee v Chase Ferguson | 3-6,2-6 |
| ITF M15 Maanshan | 2025/03/05 02:00 | Duckhee Lee v Nino Ehrenschneider | 2-6,1-5 |