Stadium: Court 2 Round: 45
| 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 |
| Thailande F6, Qualifications Simples | 2016/12/30 03:00 | Dmitry Popko v Yunseong Chung | 6-4,4-6,6-1 |
| ITF Korea F8 | 2016/09/03 01:00 | Seon Yong Han v Oh, Seong-Gook | 6-4,6-1 |
| ITF Japan F7 Qual | 2016/06/04 01:00 | Tashiro, Yuga v Oh, Seong-Gook | 6-2,6-2 |
| ITF Guam F1 | 2016/05/25 01:35 | Oh, Seong-Gook v Katayama, Sho | 4-6,1-6 |
| ITF Guam F1 | 2016/05/23 02:25 | Oh, Seong-Gook v Ren Nakamura | 6-4,6-4 |
| ITF Guam F1 | 2016/05/22 00:00 | Oh, Seong-Gook v Nouchi, Kennosuke | 6-4,6-1 |
| ITF China F6 Qual | 2016/05/09 02:00 | Yusuke Takahashi v Oh, Seong-Gook | 6-1,6-4 |
| ITF China F6 Qual | 2016/05/08 02:00 | Li, Jianhui v Oh, Seong-Gook | 6-7,4-6 |
| ITF China F6 Qual | 2016/05/07 02:00 | Fan, Yishuo v Oh, Seong-Gook | 0-6,0-6 |