Stadium: Court 14 Round: 25
| ITF Korea F5 | 2018/08/20 01:00 | Sung Jun Park v Ku Keon Kang | 3-6,1-6 |
| ITF Korea F5 | 2018/08/19 02:00 | Sungbeen Sim v Ku Keon Kang | 1-6,0-6 |
| ITF Korea F4 | 2018/08/15 01:00 | Ryota Tanuma v Ku Keon Kang | 7-5,7-6 |
| ITF Korea F4 | 2018/08/14 01:00 | Ku Keon Kang v Jung Hoon Kim | 6-0,6-1 |
| ITF Korea F4 | 2018/08/13 01:00 | Ku Keon Kang v Seoung Hun Lee | 6-2,6-2 |
| ITF Korea F3 Qual | 2018/06/17 04:30 | Ku Keon Kang v Hyeong Don Kim | 4-6,6-1,4-6 |
| ITF Korea F3 Qual | 2018/06/16 03:30 | Ku Keon Kang v Sung Hun Kim | 6-4,7-5 |
| ITF Korea F2 | 2018/06/13 04:45 | Ji Hoon Son v Ku Keon Kang | 6-1,6-4 |
| Challenger Gwangju Qual | 2018/08/13 01:00 | Jung-Woong Na v Yecong He | 6-3,5-7,5-7 |
| Challenger Gwangju Qual | 2018/08/12 01:30 | Shintaro Imai v Jung-Woong Na | 4-6,2-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Issei Okamura v Jung-Woong Na | 3-6,6-1,1-6 |
| ITF Korea F1 | 2018/06/06 01:00 | Jung-Woong Na v Ji Hoon Son | 6-4,6-7,6-4 |
| Challenger Busan | 2018/05/15 05:50 | Max Purcell v Jung-Woong Na | 6-4,6-1 |
| 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 |