| ITF Korea F4 | 2018/08/12 02:00 | Hyung-Chan Lim v Seong Woon Yu | 4-6,4-6 |
| ITF Korea F3 Qual | 2018/06/16 03:30 | Seong Woon Yu v Dae-Hee Lee | 4-6,4-6 |
| ITF Korea F2 | 2018/06/10 03:30 | Seong Woon Yu v Alec Adamson | 5-7,3-6 |
| ITF Korea F2 | 2018/06/09 02:00 | Seong Woon Yu v Jun Su Kim | 6-2,6-0 |
| ITF Korea F1 | 2018/06/03 01:00 | Tae-Woo Lee v Seong Woon Yu | 6-1,2-6,6-1 |
| ITF Korea F1 | 2018/06/02 01:00 | Jeong Heon Lee v Seong Woon Yu | 6-1,3-6,2-6 |
| ITF Korea F8 | 2016/08/21 02:00 | Woo-Ram Kim v Seong Woon Yu | 6-0,6-2 |
| ITF Korea F8 | 2016/08/20 03:30 | Sung Jun Park v Seong Woon Yu | 6-4,2-6,3-6 |
| ITF Korea F4 | 2018/08/12 02:00 | Jung Ho Shin v Young Seok Lee | 3-6,3-6 |
| Challenger Gimcheon | 2018/05/08 05:40 | Young Seok Lee v Makoto Ochi | 1-6,1-6 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | Ji-Ha Kim v Young Seok Lee | 3-6,7-6,6-2 |