Ground: Hardcourt outdoor
| ITF M15 Anseong | 2022/08/17 03:10 | Colin Sinclair v Geun Jun Kim | 7-5,6-2 |
| ITF M25 Harmon | 2022/06/07 03:15 | Colin Sinclair v Geun Jun Kim | 6-7,3-6 |
| Challenger Guangzhou | 2025/04/28 02:00 | Andre Ilagan v Colin Sinclair | 6-3,7-5 |
| Challenger Guangzhou | 2025/04/27 02:00 | Colin Sinclair v Jake Delaney | 6-3,3-6,6-4 |
| ITF M15 Luan | 2025/04/24 03:30 | Colin Sinclair v Ilya Ivashka | 2-6,4-6 |
| ITF M15 Luan | 2025/04/23 03:30 | Colin Sinclair v You Du | 6-4,6-4 |
| ITF M15 Luan | 2025/04/15 05:00 | Colin Sinclair v Ye Cong Mo | 4-6,6-3,4-6 |
| ITF M15 Luan | 2025/04/11 03:30 | Colin Sinclair v Woobin Shin | 6-3,3-6,4-6 |
| ITF M15 Luan | 2025/04/10 03:30 | Colin Sinclair v Yaojie Zeng | 4-6,6-3,7-6 |
| ITF M15 Luan | 2025/04/09 03:30 | Colin Sinclair v Suk Hyun Choo | 6-3,6-4 |
| ITF M15 Andong | 2025/05/19 09:39 | Geun Jun Kim v Junhyun Lee | 7-5,3-6,1-0 |
| ITF M15 Luan | 2025/04/19 02:00 | Pawit Sornlaksup v Geun Jun Kim | 6-0,6-3 |
| ITF M15 Luan | 2025/04/17 03:30 | Geun Jun Kim v Ye Cong Mo | 7-6,2-6,6-3 |
| ITF M15 Luan | 2025/04/16 07:18 | Geun Jun Kim v Fumin Jiang | 7-6,2-2 |
| ITF M25 Ahmedabad | 2025/03/23 04:30 | Geun Jun Kim v Dmitrii Baskov | 6-4,3-6,1-0 |
| ITF M15 Yanagawa | 2024/10/29 00:30 | Geun Jun Kim v Yuto Oki | 1-6,6-3,8-10 |
| ITF M15 Yanagawa | 2024/10/28 01:30 | Geun Jun Kim v Natsuki Yamamoto | 7-5,6-2 |
| ITF M15 Tanagura | 2024/10/21 00:30 | Ren Nakamura v Geun Jun Kim | 2-6,2-6 |