Stadium: Court E Round: 25 Ground: Hardcourt outdoor
| ITF Korea F3 | 2018/06/23 03:55 | Takuto Niki v Ji Sung Nam | 3-6,6-4,1-6 |
| ITF China F9 | 2014/07/24 02:00 | Takuto Niki v Ji Sung Nam | 5-7,4-6 |
| Challenger Kobe | 2018/11/10 05:15 | Takuto Niki v Taisei Ichikawa | 6-2,6-7,3-6 |
| ITF USA F26 | 2018/09/30 18:00 | Michael Shabaz v Takuto Niki | 3-6,6-3,3-6 |
| ITF USA F26 | 2018/09/29 18:00 | Takuto Niki v Strong Kirchheimer | 3-6,6-1,6-3 |
| ITF USA F26 | 2018/09/28 17:00 | Alan Kohen v Takuto Niki | 6-7,4-6 |
| ITF USA F26 | 2018/09/27 17:00 | Emilio Nava v Takuto Niki | 4-6,6-7 |
| ITF USA F26 | 2018/09/26 17:00 | Siem Woldeab v Takuto Niki | 2-6,2-6 |
| ITF USA F25 | 2018/09/20 20:25 | Takuto Niki v Emilio Nava | 3-6,1-6 |
| ITF USA F25 | 2018/09/19 21:30 | Takuto Niki v Zachary Svajda | 6-4,6-2 |
| Challenger Da Nang | 2019/01/06 08:35 | Ji Sung Nam v N.Sriram Balaji | 6-7,6-7 |
| Challenger Kobe | 2018/11/12 06:35 | Nam Hoang Ly v Ji Sung Nam | 6-7,7-6,6-2 |
| Challenger Shenzhen 2 | 2018/10/28 02:30 | Yaraslav Shyla v Ji Sung Nam | 7-6,2-6,6-3 |
| Challenger Shenzhen 2 | 2018/10/27 02:00 | Yuanfeng Li v Ji Sung Nam | 4-6,1-6 |
| Challenger Liuzhou | 2018/10/20 04:30 | Yecong He v Ji Sung Nam | 2-6,6-3,6-2 |
| ITF Korea F5 | 2018/08/26 03:00 | Ji Sung Nam v Makoto Ochi | 6-4,6-1 |
| ITF Korea F5 | 2018/08/25 01:00 | Cheong-Eui Kim v Ji Sung Nam | 2-6,3-6 |
| ITF Korea F5 | 2018/08/24 01:15 | Ji Sung Nam v Ji Hoon Son | 6-4,6-2 |