Round: 44 Ground: Hardcourt outdoor
| 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 |
| ITF Korea F8 | 2016/08/20 03:30 | Sung Jun Park v Seong Woon Yu | 6-4,2-6,3-6 |
| Challenger Seoul Qual | 2017/05/06 06:05 | Yu-Seob Kim v Shuichi Sekiguchi | 1-6,4-6 |
| ITF Korea F8 | 2016/09/04 04:30 | Yu-Seob Kim v Jeamoon Lee | 3-6,1-6 |
| ITF Korea F8 | 2016/08/28 02:00 | Yu-Seob Kim v Chan-Yeong Oh | 3-6,2-6 |
| ITF Korea F8 | 2016/08/21 04:30 | Oh-Hee Kwon v Yu-Seob Kim | 6-2,6-3 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | Jae-Won Choi v Yu-Seob Kim | 6-2,6-3 |
| ITF Korea F1 | 2015/05/16 01:00 | Yu-Seob Kim v Dong-Hak Sin | 3-6,3-6 |