Stadium: Court 14 Round: 25
| ITF Korea F5 | 2018/08/20 01:00 | Park, Sung Jun v Kang, Ku Keon | 3-6,1-6 |
| ITF Korea F5 | 2018/08/19 02:00 | Sungbeen Sim v Kang, Ku Keon | 1-6,0-6 |
| ITF Korea F4 | 2018/08/15 01:00 | Tanuma, Ryota v Kang, Ku Keon | 7-5,7-6 |
| ITF Korea F4 | 2018/08/14 01:00 | Kang, Ku Keon v Kim, Jung Hoon | 6-0,6-1 |
| ITF Korea F4 | 2018/08/13 01:00 | Kang, Ku Keon v Lee, Seounghun | 6-2,6-2 |
| Korea F3, Singles Qualifying | 2018/06/17 04:30 | Kang, Ku Keon v Kim, Hyeong Don | 4-6,6-1,4-6 |
| Korea F3, Singles Qualifying | 2018/06/16 03:30 | Kang, Ku Keon v Kim, Sung Hun | 6-4,7-5 |
| ITF Korea F2 | 2018/06/13 04:45 | Son, Ji Hoon v Kang, Ku Keon | 6-1,6-4 |
| Challenger Gwangju Qual | 2018/08/13 01:00 | Na, Jung-Woong v He, Yecong | 6-3,5-7,5-7 |
| Challenger Gwangju Qual | 2018/08/12 01:30 | Shintaro Imai v Na, Jung-Woong | 4-6,2-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Issei Okamura v Na, Jung-Woong | 3-6,6-1,1-6 |
| ITF Korea F1 | 2018/06/06 01:00 | Na, Jung-Woong v Son, Ji Hoon | 6-4,6-7,6-4 |
| Challenger - Busan | 2018/05/15 05:50 | Max Purcell v Na, Jung-Woong | 6-4,6-1 |
| Challenger Gimcheon Qual | 2018/05/05 05:20 | Grills, Jacob v Na, Jung-Woong | 5-7,6-4,6-3 |
| Challenger Seoul Qual | 2018/04/29 02:00 | Na, Jung-Woong v Makoto Ochi | 2-6,4-6 |
| Challenger Seoul Qual | 2018/04/28 03:05 | Na, Jung-Woong v Lee, Tae-Woo | 6-1,6-3 |