Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Challenger Seoul | 2019/05/01 02:00 | Ji Sung Nam v Ramkumar Ramanathan | 3-6,6-7 |
| Challenger Seoul | 2019/04/30 03:35 | Ji Sung Nam v Duckhee Lee | 7-5,6-1 |
| Challenger Seoul | 2019/04/29 02:00 | Ji Sung Nam v Ji Hoon Son | 6-3,6-2 |
| ITF M25 Matsuyama | 2019/04/12 01:00 | Ji Sung Nam v Gage Brymer | 3-6,3-6 |
| ITF M25 Matsuyama | 2019/04/09 04:55 | Ji Sung Nam v Mark Whitehouse | 7-6,6-2 |
| ITF M15 Kashiwa | 2019/04/03 06:15 | Jumpei Yamasaki v Ji Sung Nam | 6-3,2-6,7-6 |
| ITF M15 Nishi-Tokyo | 2019/03/15 02:20 | Hiroyasu Ehara v Ji Sung Nam | 6-3,3-6,7-6 |
| ITF M15 Nishi-Tokyo | 2019/03/14 01:00 | Min-Kyu Song v Ji Sung Nam | 4-6,3-6 |
| ITF M25 Shymkent | 2019/04/16 04:00 | Timur Maulenov v Sultan Narbekov | 6-3,4-6,10-7 |
| ITF M25 Shymkent | 2019/04/15 05:35 | Sultan Narbekov v Shonigmatjon Shofayziyev | 7-6,5-7,10-5 |
| ITF M25 Shymkent | 2019/04/08 05:30 | Sultan Narbekov v Aliaksandr Liaonenka | 1-6,6-7 |
| ITF M25 Aktobe | 2019/02/18 06:00 | Sultan Narbekov v Timur Kiyamov | 6-7,2-6 |
| ITF M25 Aktobe | 2019/02/13 10:25 | Sultan Narbekov v Lucas Catarina | 2-6,4-6 |
| ITF M15 Sharm El Sheikh | 2019/01/21 08:00 | Adrian Andrzejczuk v Sultan Narbekov | 6-3,6-2 |
| ITF Turkey F36 | 2018/11/11 09:00 | Sultan Narbekov v Edward Hubner | 1-6,4-6 |
| ITF Turkey F36 | 2018/11/10 08:30 | Stefan Suvajac v Sultan Narbekov | 0-6,7-5,0-6 |