Stadium: Court 4 Round: 26
| ITF Korea F2 | 2018/06/13 04:45 | Son, Ji Hoon v Kang, Ku Keon | 6-1,6-4 |
| ITF Korea F1 | 2018/06/06 01:00 | Na, Jung-Woong v Son, Ji Hoon | 6-4,6-7,6-4 |
| ITF Vietnam F3 | 2018/05/18 03:00 | Son, Ji Hoon v Nam, Ji Sung | 1-6,2-6 |
| ITF Vietnam F3 | 2018/05/16 03:00 | Son, Ji Hoon v Kushnirovich, Gary | 4-6,7-6,6-1 |
| ITF Vietnam F3 | 2018/05/15 03:00 | Nam Hoang Ly v Son, Ji Hoon | 1-6,4-6 |
| ITF Vietnam F2 | 2018/05/08 03:00 | Nam Hoang Ly v Son, Ji Hoon | 3-6,7-5,6-0 |
| ITF Vietnam F2 | 2018/05/06 04:00 | Son, Ji Hoon v Noh, Sang-Woo | 6-2,6-1 |
| Challenger Seoul | 2018/05/03 08:30 | Jordan Thompson v Son, Ji Hoon | 7-5,7-6 |
| ITF Korea F2 | 2018/06/13 04:55 | Niki, Takuto v Song, Min-Kyu | 3-6,7-5,6-3 |
| ITF Korea F1 | 2018/06/09 02:35 | Niki, Takuto v Jeamoon Lee | 3-6,6-4,4-6 |
| ITF Korea F1 | 2018/06/08 03:30 | Niki, Takuto v Chung, Hong | 6-1,6-0 |
| ITF Korea F1 | 2018/06/07 04:25 | Niki, Takuto v Noh, Sang-Woo | 6-3,6-2 |
| ITF Korea F1 | 2018/06/06 01:00 | Niki, Takuto v Kim, Sang Yeop | 6-0,6-0 |
| ITF Singapore F3 | 2018/05/29 04:05 | Niki, Takuto v Congsup Congcar | 5-7,1-6 |
| ITF Singapore F2 | 2018/05/26 03:00 | Niki, Takuto v Collin Altamirano | 6-7,3-6 |
| ITF Singapore F2 | 2018/05/24 03:00 | Nolan, Daniel v Niki, Takuto | 6-1,6-7,4-6 |