Stadium: I Round: 26
| ITF Korea F5 | 2018/08/21 01:00 | Jang, Woo Hyeok v Lee, Dae-Hee | 6-0,6-1 |
| ITF Korea F5 | 2018/08/20 01:00 | Jang, Woo Hyeok v Kim, Byeonghun | 6-1,6-2 |
| ITF Korea F5 | 2018/08/19 02:00 | Jang, Woo Hyeok v Park, Jaeyoung | 6-3,6-2 |
| ITF Korea F5 | 2018/08/18 01:00 | Noh, Sang-Woo v Jang, Woo Hyeok | 4-6,4-6 |
| Challenger Gwangju Qual | 2018/08/12 01:30 | Jang, Woo Hyeok v Sidharth Rawat | 0-6,3-6 |
| Challenger Gwangju Qual | 2018/08/11 03:20 | Jang, Woo Hyeok v Park, Sung Jun | 6-4,6-3 |
| Korea F3, Singles Qualifying | 2018/06/17 02:00 | Mcdaniels, Mitchell Thomas v Jang, Woo Hyeok | 7-5,6-2 |
| ITF Korea F2 | 2018/06/09 01:00 | Jang, Woo Hyeok v Kim, Sung Hun | 2-6,2-6 |
| ITF Korea F5 | 2018/08/21 01:00 | Ren Nakamura v Son, Ji Hoon | 6-4,4-6,3-6 |
| Challenger - Gwangju | 2018/08/14 06:30 | Mousley, Bradley v Son, Ji Hoon | 6-3,6-2 |
| Challenger Gwangju Qual | 2018/08/13 01:00 | Kibi, Yuya v Son, Ji Hoon | 3-6,4-6 |
| Challenger Gwangju Qual | 2018/08/11 03:35 | Son, Ji Hoon v Gao, Xin | 7-5,6-3 |
| ITF China F10 | 2018/07/10 02:00 | Son, Ji Hoon v Gao, Xin | 6-7,6-7 |
| ITF China F9 | 2018/07/08 03:00 | Son, Ji Hoon v Yan Bai | 7-6,4-6,4-6 |
| ITF China F9 | 2018/07/07 07:25 | Hong, Seong Chan v Son, Ji Hoon | 6-7,1-6 |
| ITF China F9 | 2018/07/06 03:00 | Wu, Hao v Son, Ji Hoon | 1-6,5-7 |