Stadium: Court 10 Round: 62
| ITF Korea F4 | 2018/08/11 01:00 | Yun, Jae Won v Park, Jaeyoung | 6-1,6-3 |
| Korea F3, Singles Qualifying | 2018/06/17 03:00 | Jeong, Young-Hoon v Yun, Jae Won | 6-2,6-2 |
| Korea F3, Singles Qualifying | 2018/06/16 05:00 | Yun, Jae Won v Kim, Cheong Hwi | 6-0,5-7,6-1 |
| ITF Korea F2 | 2018/06/09 02:00 | Yun, Jae Won v Jung, Hyeon IL | 6-4,4-6,3-6 |
| ITF Korea F5 | 2017/06/25 01:00 | Shin, Geon Ju v Yun, Jae Won | 6-4,6-3 |
| Korea F3, Singles Qualifying | 2017/06/10 05:00 | Yun, Jae Won v Shin, Seung-Hun | 3-6,2-6 |
| ITF Korea F2 | 2017/06/06 01:00 | Yun, Jae Won v Chan-Yeong Oh | 2-6,0-6 |
| ITF Korea F1 Qual | 2017/05/27 02:00 | Yun, Jae Won v Kang, Hogi | 7-5,2-6,3-6 |
| Korea F3, Singles Qualifying | 2018/06/16 01:00 | Shin, Geon Ju v Lee, Seounghun | 3-6,4-6 |
| ITF Korea F2 | 2018/06/10 05:00 | Noh, Sang-Woo v Lee, Seounghun | 6-3,6-3 |
| ITF Korea F2 | 2018/06/09 02:00 | Lee, Seounghun v Shin, Geon Ju | 6-3,6-4 |
| ITF Korea F1 | 2018/06/02 02:00 | Park, Sung Jun v Lee, Seounghun | 6-1,6-1 |
| Challenger Gwangju Qual | 2017/09/16 01:30 | Lee, Seounghun v Lee, Dae-Hee | 4-6,3-6 |
| ITF Korea F5 | 2017/06/26 01:30 | Hong, Seong Chan v Lee, Seounghun | 6-3,6-0 |
| ITF Korea F4 | 2017/06/19 01:00 | Kim, Woo-Ram v Lee, Seounghun | 4-6,6-3,6-2 |
| Korea F3, Singles Qualifying | 2017/06/11 04:30 | Shin, Seung-Hun v Lee, Seounghun | 6-3,7-6 |