Round: 62 Ground: Hardcourt outdoor
| ITF Korea F3 Qual | 2018/06/16 02:00 | Ilsang Yoon v Dong Ju Kim | 6-2,6-2 |
| ITF Korea F1 | 2018/06/03 01:00 | Young-Hoon Jeong v Ilsang Yoon | 6-4,5-7,6-2 |
| ITF Korea F1 | 2018/06/02 03:30 | Ilsang Yoon v Jin Sung Han | 7-6,4-6,6-3 |
| ITF Indonesia F8 Qual | 2017/11/26 05:10 | Manish Sureshkumar v Ilsang Yoon | 6-0,6-1 |
| ITF Indonesia F8 Qual | 2017/11/25 06:00 | Kento Tagashira v Ilsang Yoon | 6-7,6-3,6-7 |
| ITF Indonesia F7 Qual | 2017/11/19 05:25 | Natthasith Kunsuwan v Ilsang Yoon | 6-2,7-5 |
| ITF Indonesia F7 Qual | 2017/11/18 03:00 | Ilsang Yoon v Dustin Goldenberg | 6-4,6-3 |
| ITF Korea F3 Qual | 2018/06/16 02:00 | Jaeheon Yoon v Dylan Seong Kwan Kim | 6-4,6-4 |
| ITF Korea F2 | 2018/06/10 01:00 | Jaeheon Yoon v Sang Yeop Kim | 1-6,1-6 |
| ITF Korea F2 | 2018/06/09 01:00 | Jaeheon Yoon v Seungri Choi | 6-1,7-5 |
| ITF Korea F1 | 2018/06/03 02:00 | Byeonghun Kim v Jaeheon Yoon | 6-1,6-2 |
| ITF Korea F4 | 2017/06/17 04:00 | Jun Sang Park v Jaeheon Yoon | 6-0,6-2 |
| ITF Korea F3 Qual | 2017/06/11 03:00 | Jaeheon Yoon v Hyeong Jin Cho | 2-6,1-6 |
| ITF Korea F2 Qual | 2017/06/03 03:00 | Tae-Woo Lee v Jaeheon Yoon | 7-6,6-2 |
| ITF Korea F1 Qual | 2016/06/12 03:00 | Oh-Hee Kwon v Jaeheon Yoon | 6-1,6-0 |