Stadium: Clay Court 4 Round: 44 Ground: Hardcourt outdoor
| ITF Turkey F4 | 2018/01/29 08:00 | Ji Sung Nam v Dan Dowson | 7-5,6-7,4-6 |
| ITF Turkey F4 | 2018/01/28 07:30 | Ji Sung Nam v Sorin Andrei Iordache | 6-2,6-4 |
| ITF Thailand F12 | 2017/12/14 03:30 | Renta Tokuda v Ji Sung Nam | 6-3,6-2 |
| ITF Thailand F12 | 2017/12/13 04:30 | Ji Sung Nam v Daniel Altmaier | 7-5,6-2 |
| ITF Thailand F12 | 2017/12/12 08:20 | Hady Habib v Ji Sung Nam | 5-7,5-7 |
| ITF Thailand F12 Qual | 2017/12/11 04:25 | Ji Sung Nam v Chien Hsun Lo | 6-4,7-5 |
| ITF Thailand F12 Qual | 2017/12/10 03:00 | Ryota Tanuma v Ji Sung Nam | 4-6,2-6 |
| ITF Thailand F12 Qual | 2017/12/09 05:30 | Ji Sung Nam v Chanon Phunsawat | 6-3,6-1 |
| ITF Turkey F3 | 2018/01/23 07:30 | Ki Su Jung v Jung-Woong Na | 1-6,2-6 |
| ITF Turkey F2 | 2018/01/16 07:30 | Ki Su Jung v Calin Manda | 7-6,3-6,6-7 |
| ITF Korea F5 | 2017/06/28 04:55 | Daniel Yoo v Ki Su Jung | 6-0,6-1 |
| ITF Korea F4 | 2017/06/20 02:30 | Ki Su Jung v Min-Kyu Song | 3-6,0-6 |
| ITF Korea F3 | 2017/06/13 04:40 | Jung-Woong Na v Ki Su Jung | 6-4,6-1 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | Ki Su Jung v Ivan Kalinin | 6-7,2-6 |
| ITF Korea F1 Qual | 2017/05/27 01:00 | Jaeyoung Park v Ki Su Jung | 7-5,6-3 |
| Challenger Busan Qual | 2017/05/13 03:15 | Ki Su Jung v Joe Salisbury | 4-6,6-4,3-6 |