Stadium: Centre Court Round: 28
| ITF Korea F3 | 2018/06/22 05:10 | Nam, Ji Sung v Kim, Cheong-Eui | 6-7,6-4,6-3 |
| ITF Korea F2 | 2018/06/16 01:00 | Kim, Cheong-Eui v Nam, Ji Sung | 4-6,2-6 |
| ITF Korea F1 Qual | 2014/05/01 03:00 | Kim, Cheong-Eui v Nam, Ji Sung | 1-6,7-5,2-6 |
| ITF Korea F5 | 2018/08/24 01:15 | Kim, Cheong-Eui v Jae Hwan Kim | 6-3,6-3 |
| ITF Korea F5 | 2018/08/23 02:00 | Kim, Cheong-Eui v Im, Seong Taek | 7-6,6-0 |
| ITF Korea F5 | 2018/08/21 03:15 | Kim, Cheong-Eui v Batalla Diez, Juan Ignacio | 6-1,6-2 |
| Challenger - Gwangju | 2018/08/14 01:00 | Kim, Cheong-Eui v Sidharth Rawat | 5-7,7-6,2-6 |
| ITF Indonesia F2 | 2018/08/03 02:00 | Kim, Cheong-Eui v Kaito Uesugi | 4-6,6-7 |
| ITF Indonesia F2 | 2018/08/02 03:00 | Kim, Cheong-Eui v Sho Shimabukuro | 6-4,6-4 |
| ITF Indonesia F2 | 2018/08/01 02:30 | Kim, Cheong-Eui v Cing-Yang Meng | 6-1,6-1 |
| ITF Indonesia F1 | 2018/07/27 02:00 | Kim, Cheong-Eui v Beale, Jeremy | 4-6,4-6 |
| ITF Korea F5 | 2018/08/24 01:15 | Nam, Ji Sung v Son, Ji Hoon | 6-4,6-2 |
| ITF Korea F5 | 2018/08/23 04:45 | Nam, Ji Sung v Bourchier, Edward | 6-2,6-2 |
| ITF Korea F5 | 2018/08/21 01:00 | Nam, Ji Sung v Han, Seong Jae | 6-1,6-0 |
| Challenger - Gwangju | 2018/08/19 01:55 | Banes, Maverick v Nam, Ji Sung | 6-3,4-6,6-4 |
| Challenger - Gwangju | 2018/08/18 02:00 | Alexander Bublik v Nam, Ji Sung | 6-7,5-7 |
| Challenger - Gwangju | 2018/08/17 03:30 | Akira Santillan v Nam, Ji Sung | 2-6,3-6 |
| Challenger - Gwangju | 2018/08/16 06:00 | Xia, Zihao v Nam, Ji Sung | 2-6,3-6 |
| Challenger - Gwangju | 2018/08/14 08:20 | Nam, Ji Sung v Henri Laaksonen | 6-1,6-1 |