Stadium: Court 4 Round: 25 Ground: Hardcourt outdoor
| Challenger Columbus | 2019/06/16 17:55 | Nam, Ji Sung v Torpegaard, Mikael | 1-6,5-7 |
| Challenger Columbus | 2019/06/14 17:00 | Nam, Ji Sung v Zhizhen Zhang | 6-3,6-2 |
| Challenger Columbus | 2019/06/13 21:35 | Gonzalez, Alejandro v Nam, Ji Sung | 4-6,2-6 |
| Challenger Columbus | 2019/06/12 16:10 | Nam, Ji Sung v Wolf, Jeffrey John | 6-4,3-6,6-4 |
| Challenger Columbus | 2019/06/10 22:45 | Cannon Kingsley v Nam, Ji Sung | 5-7,4-6 |
| Challenger - Little Rock | 2019/06/04 17:50 | Joao Menezes v Nam, Ji Sung | 5-7,6-1,6-2 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/26 03:00 | Nam, Ji Sung v Sekiguchi, Shuichi | 1-6,4-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/25 03:00 | Nam, Ji Sung v Shintaro Imai | 6-4,7-5 |
| Shymkent, Singles Qualifying M-ITF-KAZ-03A | 2019/04/16 04:00 | Maulenov, Timur v Narbekov, Sultan | 6-3,4-6,10-7 |
| Shymkent, Singles Qualifying M-ITF-KAZ-03A | 2019/04/15 05:35 | Narbekov, Sultan v Shofayziyev, Shonigmatjon | 7-6,5-7,10-5 |
| Shymkent, Singles Qualifying M-ITF-KAZ-03A | 2019/04/08 05:30 | Narbekov, Sultan v Aliaksandr Liaonenka | 1-6,6-7 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2019/02/18 06:00 | Narbekov, Sultan v Kiyamov, Timur | 6-7,2-6 |
| Aktobe, Singles Qualifying M-ITF-KAZ-02A | 2019/02/13 10:25 | Narbekov, Sultan v Lucas Catarina | 2-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2019/01/21 08:00 | Andrzejczuk, Adrian v Narbekov, Sultan | 6-3,6-2 |
| ITF Turkey F36 | 2018/11/11 09:00 | Narbekov, Sultan v Hubner, Edward | 1-6,4-6 |
| ITF Turkey F36 | 2018/11/10 08:30 | Suvajac, Stefan v Narbekov, Sultan | 0-6,7-5,0-6 |