Round: 25 Ground: Hardcourt outdoor
| ITF Korea F1 Qual | 2017/05/29 02:55 | Sungbeen Sim v Dong-Hak Sin | 3-6,0-6 |
| ITF Korea F1 Qual | 2017/05/28 03:30 | Dong-Hak Sin v Dukyoung Kim | 3-6,6-3,6-1 |
| ITF Korea F1 Qual | 2017/05/27 02:00 | Dong-Hak Sin v Hyeong Jin Cho | 6-3,6-4 |
| ITF Korea F8 | 2016/09/04 03:00 | Masaki Sasai v Dong-Hak Sin | 6-2,6-1 |
| ITF Korea F8 | 2016/09/03 01:00 | Jae-Won Choi v Dong-Hak Sin | 4-6,5-7 |
| ITF Korea F1 Qual | 2016/06/13 05:00 | Dong-Hak Sin v Jong-Min Choi | 3-6,3-6 |
| ITF Korea F1 Qual | 2016/06/12 03:00 | Dong-Hak Sin v Seong Woon Yu | 6-3,6-2 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | Geon Ju Shin v Dong-Hak Sin | 7-6,4-6,4-6 |
| ITF Korea F1 Qual | 2017/05/29 04:45 | A-Ram Kim v Sung Jun Park | 2-6,1-6 |
| ITF Korea F1 Qual | 2017/05/28 03:30 | Sung Jun Park v Yu-Seob Kim | 6-0,6-1 |
| Challenger Gimcheon Qual | 2017/04/29 06:05 | Sung Jun Park v Luke Saville | 1-6,0-6 |
| ITF Thailand F4 | 2016/12/10 07:00 | Keisuke Numajiri v Sung Jun Park | 7-6,2-6,6-0 |
| ITF Thailand F4 | 2016/12/10 02:30 | Tonkla Mulada v Sung Jun Park | 3-6,1-6 |
| ITF Korea F8 | 2016/09/03 02:00 | Woo-Ram Kim v Sung Jun Park | 6-4,4-6,6-1 |
| ITF Korea F8 | 2016/08/29 01:30 | Oh-Hee Kwon v Sung Jun Park | 6-2,7-5 |
| ITF Korea F8 | 2016/08/28 03:00 | Chuanqi Su v Sung Jun Park | 0-6,0-6 |