Round: 25 Ground: Hardcourt outdoor
| ITF Thailand F4 | 2016/12/13 05:30 | Wattanakul, Pol v Kim, Seong Kwan | 6-3,6-1 |
| ITF Korea F8 | 2016/09/08 03:00 | Nam, Ji Sung v Kim, Seong Kwan | 6-4,6-0 |
| ITF Korea F8 | 2016/09/07 03:50 | Sanhui Shin v Kim, Seong Kwan | 2-6,4-6 |
| ITF Korea F8 | 2016/09/06 01:30 | Kim, Seong Kwan v Katayama, Sho | 6-0,6-1 |
| ITF Korea F7 | 2016/08/30 04:35 | Kim, Seong Kwan v Cho, Min Hyeok | 3-6,3-6 |
| ITF Korea F1 | 2016/06/18 02:00 | Lim, Yong-Kyu v Kim, Seong Kwan | 7-5,6-1 |
| ITF Korea F1 | 2016/06/17 01:00 | Kim, Seong Kwan v Kwon, OH-Hee | 6-4,6-3 |
| ITF Korea F1 | 2016/06/16 01:00 | Na, Jung-Woong v Kim, Seong Kwan | 4-6,6-3,6-7 |
| Challenger Busan Qual | 2017/05/13 05:50 | Yunseong Chung v Oh, Seong-Gook | 6-4,6-7,3-6 |
| Challenger Seoul | 2017/05/10 03:30 | Yunseong Chung v Hiroki Moriya | 6-4,6-7,3-6 |
| Challenger Seoul | 2017/05/08 05:30 | Lu, Yen-Hsun v Yunseong Chung | 3-6,4-6 |
| Challenger Gimcheon | 2017/05/01 04:25 | Klein, Brydan v Yunseong Chung | 6-3,6-4 |
| Challenger Taipei Qual | 2017/04/16 06:50 | Toshihide Matsui v Yunseong Chung | 7-6,6-4 |
| ITF Japan F1 | 2017/03/07 02:35 | Yunseong Chung v Huang, Liang-Chi | 3-6,6-7 |
| Yokohama, Japan, Qualifying | 2017/02/25 04:50 | Yunseong Chung v Soonwoo Kwon | 6-7,5-7 |
| Challenger Kyoto Qual | 2017/02/18 05:25 | Yunseong Chung v Niki, Takuto | 2-6,6-7 |