Stadium: Court 4 Round: 25
| ITF Vietnam F2 | 2018/05/06 04:00 | Nam, Ji Sung v Skadarka, Stefan | 6-0,6-4 |
| ITF Vietnam F2 | 2018/05/05 07:00 | Nam, Ji Sung v Kerdlaphee, Phongsapak | 6-2,6-1 |
| Challenger Seoul Qual | 2018/04/30 03:00 | Yosuke Watanuki v Nam, Ji Sung | 7-5,6-2 |
| Challenger Seoul Qual | 2018/04/29 03:35 | Nam, Ji Sung v Blake Ellis | 6-3,6-3 |
| Challenger Seoul Qual | 2018/04/28 01:30 | Yoo, Daniel v Nam, Ji Sung | 2-6,2-6 |
| ITF Turkey F5 | 2018/02/06 08:30 | Son, Ji Hoon v Nam, Ji Sung | 4-6,7-6,6-1 |
| ITF Turkey F5 | 2018/02/05 07:30 | Nam, Ji Sung v Yuichiro Inui | 7-5,6-0 |
| ITF Turkey F5 | 2018/02/04 07:30 | Nam, Ji Sung v Jung, Ki-Su | 7-6,6-3 |
| Nigeria F1, Singles | 2018/04/18 10:30 | Singh, Karunuday v Jelle Sels | 4-6,4-6 |
| Nigeria F1, Singles | 2018/04/16 09:00 | Jakub Paul v Singh, Karunuday | 4-6,3-6 |
| ITF India F4 | 2018/03/20 05:00 | Singh, Karunuday v Manish Sureshkumar | 4-6,2-6 |
| ITF India F3 | 2018/03/15 04:00 | Singh, Karunuday v Nam Hoang Ly | 1-6,1-6 |
| ITF India F3 | 2018/03/14 05:55 | Singh, Karunuday v Malik, Vijayant | 6-2,6-1 |
| ITF India F2 | 2018/03/09 04:30 | Boluda-Purkiss, Carlos v Singh, Karunuday | 7-6,6-4 |
| ITF India F2 | 2018/03/08 05:25 | Singh, Karunuday v R Prabodh, Suraj | 6-3,3-6,6-3 |
| ITF India F2 | 2018/03/07 05:20 | Luka Pavlovic v Singh, Karunuday | 4-6,2-6 |