Stadium: Court 2 Round: 54
| 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 |
| ITF Turkey F4 | 2018/01/29 08:00 | Nam, Ji Sung v Dowson, Dan | 7-5,6-7,4-6 |
| ITF Turkey F4 | 2018/01/28 07:30 | Nam, Ji Sung v Iordache, Sorin Andrei | 6-2,6-4 |
| ITF Vietnam F1 | 2018/04/28 05:00 | Skadarka, Stefan v Kerdlaphee, Phongsapak | 2-6,6-2,6-3 |
| Turkey F15, Singles Qualifying | 2018/04/14 09:30 | Kranic, Karlo v Kerdlaphee, Phongsapak | 1-6,6-1,6-2 |
| Turkey F14, Singles Qualifying | 2018/04/07 09:30 | Oliveira, Cristian v Kerdlaphee, Phongsapak | 6-0,6-1 |
| ITF Turkey F13 | 2018/03/31 08:30 | Onishi, Ken v Kerdlaphee, Phongsapak | 6-4,6-2 |
| ITF Egypt F9 | 2018/03/11 08:00 | Kerdlaphee, Phongsapak v Montsi, Siphosothando | 2-6,4-6 |
| ITF Egypt F8 | 2018/03/03 12:30 | Kerdlaphee, Phongsapak v Gerritsen, Stephan | 1-6,4-6 |
| Egypt F7, Singles Qualifying | 2018/02/24 08:00 | Gonzalez, Wilfredo v Kerdlaphee, Phongsapak | 6-2,6-3 |
| Egypt F6, Singles Qualifying | 2018/02/17 08:00 | Kerdlaphee, Phongsapak v Vejnovic, Marko | 1-6,5-7 |