Round: 44 Ground: Hardcourt outdoor
| Challenger Busan Qual | 2017/05/13 03:15 | Ki Su Jung v Joe Salisbury | 4-6,6-4,3-6 |
| Challenger Seoul Qual | 2017/05/06 02:40 | Ki Su Jung v Austin Krajicek | 1-6,2-6 |
| Challenger Gimcheon Qual | 2017/04/30 03:45 | Takuto Niki v Ki Su Jung | 6-1,6-2 |
| Challenger Gimcheon Qual | 2017/04/29 04:30 | Ki Su Jung v Min Hyun Lee | 6-4,6-3 |
| ITF Korea F1 | 2016/06/15 02:30 | Ki Su Jung v Oh-Hee Kwon | 3-6,6-4,3-6 |