| ITF M25 Anseong | 06/18 01:00 | 62 | Jinseok Yu v Hyun Woo Cho | 1-6,3-6 | |
| ITF M25 Changwon | 06/11 07:30 | 62 | Ku Keon Kang v Jinseok Yu | 7-6,6-1 | |
| ITF M25 Daegu | 06/05 06:25 | 62 | Ku Keon Kang v Jinseok Yu | 6-1,4-6,10-7 | |
| ITF M25 Daegu | 06/04 01:00 | 62 | Jinseok Yu v Jiho Lee | 6-3,6-3 | |
| Challenger Gimcheon Qual | 05/06 05:50 | 46 | Jinseok Yu v Brydan Klein | 3-6,4-6 | |
| Challenger Gimcheon Qual | 05/05 06:25 | 45 | Jinseok Yu v Woobin Shin | 6-2,6-2 | |
| ITF Korea F8 | 09/05 01:30 | 62 | Sanhui Shin v Jinseok Yu | 7-5,6-3 | |
| ITF Korea F8 | 08/28 02:00 | 62 | Jinseok Yu v Ji-Ha Kim | 1-6,3-6 |