Stadium: Court 1 Round: 25
| ITF Korea F1 | 2018/06/06 01:00 | Jung-Woong Na v Ji Hoon Son | 6-4,6-7,6-4 |
| ITF Vietnam F3 | 2018/05/18 03:00 | Ji Hoon Son v Ji Sung Nam | 1-6,2-6 |
| ITF Vietnam F3 | 2018/05/16 03:00 | Ji Hoon Son v Gary Kushnirovich | 4-6,7-6,6-1 |
| ITF Vietnam F3 | 2018/05/15 03:00 | Nam Hoang Ly v Ji Hoon Son | 1-6,4-6 |
| ITF Vietnam F2 | 2018/05/08 03:00 | Nam Hoang Ly v Ji Hoon Son | 3-6,7-5,6-0 |
| ITF Vietnam F2 | 2018/05/06 04:00 | Ji Hoon Son v Sang-Woo Noh | 6-2,6-1 |
| Challenger Seoul | 2018/05/03 08:30 | Jordan Thompson v Ji Hoon Son | 7-5,7-6 |
| Challenger Seoul Qual | 2018/04/30 03:00 | Wishaya Trongcharoenchaikul v Ji Hoon Son | 6-7,4-6 |
| ITF Korea F2 | 2018/06/11 03:30 | Ku Keon Kang v Alec Adamson | 7-5,2-6,7-5 |
| ITF Korea F2 | 2018/06/10 05:00 | Ku Keon Kang v Dukyoung Kim | 6-2,6-4 |
| ITF Korea F1 | 2018/06/05 01:00 | Chan-Yeong Oh v Ku Keon Kang | 6-4,6-4 |
| ITF Vietnam F3 | 2018/05/15 03:00 | Ku Keon Kang v Paramveer Singh Bajwa | 2-6,6-7 |
| ITF Vietnam F2 | 2018/05/06 06:00 | Ku Keon Kang v Aaron Addison | 3-6,2-6 |
| ITF Vietnam F2 | 2018/05/05 07:00 | Ku Keon Kang v Artem Vu | 6-3,6-3 |
| Challenger Kaohsiung Qual | 2017/09/30 05:00 | Ku Keon Kang v Marinko Matosevic | 3-6,3-6 |
| ITF USA F31 | 2017/09/16 20:15 | Ku Keon Kang v Igor Sao Thiago | 3-6,6-2,7-5 |