Stadium: Court 5 Round: 26
| Challenger Gimcheon Qual | 2018/05/05 05:20 | Jacob Grills v Jung-Woong Na | 5-7,6-4,6-3 |
| Challenger Seoul Qual | 2018/04/29 02:00 | Jung-Woong Na v Makoto Ochi | 2-6,4-6 |
| Challenger Seoul Qual | 2018/04/28 03:05 | Jung-Woong Na v Tae-Woo Lee | 6-1,6-3 |
| ITF Turkey F5 | 2018/02/08 07:30 | Jung-Woong Na v Nino Serdarusic | 1-6,2-6 |
| ITF Turkey F5 | 2018/02/06 07:30 | Razvan M Codescu v Jung-Woong Na | 3-6,0-6 |
| ITF Turkey F5 | 2018/02/05 07:30 | Jung-Woong Na v Luka Miklavcic | 6-4,6-0 |
| ITF Turkey F5 | 2018/02/04 07:30 | Jung-Woong Na v Sorin Andrei Iordache | 6-1,7-6 |
| ITF Turkey F4 | 2018/02/01 07:30 | Dragos Dima v Jung-Woong Na | 6-2,6-3 |
| ITF Korea F5 | 2017/06/27 01:30 | Seong Chan Hong v Seong Jae Han | 6-1,6-3 |
| ITF Korea F5 | 2017/06/26 01:30 | Jun Su Kim v Seong Jae Han | 4-6,2-6 |
| ITF Korea F5 | 2017/06/25 01:00 | Seong Jae Han v Donghwi Shin | 6-2,6-2 |
| ITF Korea F4 | 2017/06/18 02:00 | Ho-Min Kang v Seong Jae Han | 6-2,3-6,6-4 |
| ITF Korea F4 | 2017/06/17 02:00 | Woo Hyeok Jang v Seong Jae Han | 2-6,6-3,3-6 |
| ITF Korea F3 Qual | 2017/06/10 05:00 | Hyeon il Jung v Seong Jae Han | 6-2,6-2 |
| ITF Korea F2 Qual | 2017/06/03 02:00 | Woo Young Lee v Seong Jae Han | 6-4,6-2 |
| ITF Korea F1 Qual | 2017/05/29 05:10 | Tae-Woo Lee v Seong Jae Han | 3-6,6-1,7-5 |