| ITF Corea F3 - Qual. | 2017/06/12 03:00 | Seong-Gook Oh v Jun Sang Park | 7-5,7-6 |
| ITF Corea F3 - Qual. | 2017/06/11 04:30 | Seong-Gook Oh v A-Ram Kim | 6-3,6-1 |
| ITF Corea F3 - Qual. | 2017/06/10 03:00 | Seong-Gook Oh v In Kyo Jeong | 6-3,6-4 |
| ITF Corea F2 - Qual. | 2017/06/03 03:00 | Seong-Gook Oh v Jun Sang Park | 4-6,2-6 |
| ITF Corea F1 - Qual. | 2017/05/29 04:20 | Seong-Gook Oh v Woo Hyeok Jang | 2-6,3-6 |
| ITF Corea F1 - Qual. | 2017/05/28 06:30 | Seong-Gook Oh v Woo-Ram Kim | 6-1,6-4 |
| Challenger Busan - Qual. | 2017/05/14 03:50 | Takuto Niki v Seong-Gook Oh | 6-4,6-3 |
| Challenger Busan - Qual. | 2017/05/13 05:50 | Yunseong Chung v Seong-Gook Oh | 6-4,6-7,3-6 |
| ITF Corea F3 - Qual. | 2017/06/12 03:00 | Tae-Woo Lee v Jun Su Kim | 6-1,6-0 |
| ITF Corea F3 - Qual. | 2017/06/11 04:30 | Tae-Woo Lee v Woo-Ram Kim | 6-2,6-4 |
| ITF Corea F3 - Qual. | 2017/06/10 03:00 | Tae-Woo Lee v Ho-Gi Kang | 6-4,6-2 |
| ITF Corea F2 | 2017/06/07 07:25 | Yunseong Chung v Tae-Woo Lee | 6-2,6-7,6-1 |
| ITF Corea F2 - Qual. | 2017/06/05 03:00 | Tae-Woo Lee v Seung-Hun Shin | 6-4,4-6,7-5 |
| ITF Corea F2 - Qual. | 2017/06/03 03:00 | Tae-Woo Lee v Jaeheon Yoon | 7-6,6-2 |
| ITF Corea F1 | 2017/06/01 02:55 | Tae-Woo Lee v Makoto Ochi | 4-6,7-5,1-6 |
| ITF Corea F1 | 2017/05/31 04:05 | Ji Hoon Son v Tae-Woo Lee | 3-6,6-0,3-6 |