Stadium: Hard Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF Korea F3 | 2017/06/13 04:40 | Na, Jung-Woong v Jung, Ki-Su | 6-4,6-1 |
| ITF Turkey F2 | 2018/01/16 07:30 | Jung, Ki-Su v Manda, Calin | 7-6,3-6,6-7 |
| ITF Korea F5 | 2017/06/28 04:55 | Yoo, Daniel v Jung, Ki-Su | 6-0,6-1 |
| ITF Korea F4 | 2017/06/20 02:30 | Jung, Ki-Su v Song, Min-Kyu | 3-6,0-6 |
| ITF Korea F3 | 2017/06/13 04:40 | Na, Jung-Woong v Jung, Ki-Su | 6-4,6-1 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | Jung, Ki-Su v Kalinin, Ivan | 6-7,2-6 |
| ITF Korea F1 Qual | 2017/05/27 01:00 | Park, Jaeyoung v Jung, Ki-Su | 7-5,6-3 |
| Challenger Busan Qual | 2017/05/13 03:15 | Jung, Ki-Su v Salisbury, Joe | 4-6,6-4,3-6 |
| Challenger Seoul Qual | 2017/05/06 02:40 | Jung, Ki-Su v Krajicek, Austin | 1-6,2-6 |
| ITF Turkey F3 | 2018/01/22 10:00 | Hossein Zade, Mohsen v Na, Jung-Woong | 2-6,0-6 |
| ITF Turkey F2 | 2018/01/15 07:00 | Sude, Jakob v Na, Jung-Woong | 4-6,7-5,6-4 |
| ITF Turkey F2 | 2018/01/14 07:00 | Na, Jung-Woong v Rogic Hadzalic, Alen | 6-2,6-1 |
| ITF Korea F5 | 2017/06/29 01:30 | Hong, Seong Chan v Na, Jung-Woong | 6-4,2-6,7-6 |
| ITF Korea F5 | 2017/06/28 01:00 | Lim, Hyung-Chan v Na, Jung-Woong | 6-4,5-7,2-6 |
| ITF Korea F4 | 2017/06/22 02:00 | Na, Jung-Woong v Kim, Cheong-Eui | 6-4,2-6,1-6 |
| ITF Korea F4 | 2017/06/20 02:20 | Na, Jung-Woong v Park, Sung Jun | 6-4,6-3 |
| ITF Korea F3 | 2017/06/15 01:00 | Song, Min-Kyu v Na, Jung-Woong | 6-1,6-1 |