Stadium: Court B Round: 44 Ground: Hardcourt outdoor
| ITF Korea F6 | 2018/08/30 04:50 | Chan-Yeong Oh v Yeongseok Jeong | 6-2,4-6,2-6 |
| ITF Korea F6 | 2018/08/29 04:30 | Chan-Yeong Oh v Lim, Hyung-Chan | 6-2,6-2 |
| ITF Korea F5 | 2018/08/24 01:15 | Chung, Hong v Chan-Yeong Oh | 7-5,6-1 |
| ITF Korea F5 | 2018/08/22 03:00 | Chan-Yeong Oh v Lucas Catarina | 4-6,6-2,6-1 |
| ITF Korea F5 | 2018/08/21 03:00 | Ito, Yuichi v Chan-Yeong Oh | 7-6,6-7,3-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | He, Yecong v Chan-Yeong Oh | 7-6,6-0 |
| ITF Korea F3 | 2018/06/18 01:00 | Yu, Cheng-Yu v Chan-Yeong Oh | 6-4,6-2 |
| ITF Korea F2 | 2018/06/15 03:20 | Chan-Yeong Oh v Yunseong Chung | 6-7,6-3,4-6 |
| ITF M15 Changwon | 2019/10/13 03:00 | Lee, Young Seok v Ren Nakamura | 7-6,6-0 |
| ITF M15 Anseong | 2019/06/26 01:00 | Kwon, OH-Hee v Lee, Young Seok | 6-2,6-2 |
| ITF M15 Anseong | 2019/06/25 01:00 | Sookton-Eng, Chanchai v Lee, Young Seok | 3-6,6-1,9-11 |
| ITF M15 Anseong | 2019/06/24 01:00 | Seon Yong Han v Lee, Young Seok | 2-6,1-6 |
| ITF - M15 Daegu | 2019/06/03 02:40 | Shin, Jung Ho v Lee, Young Seok | 4-6,3-6 |
| Challenger - Busan | 2019/05/06 02:00 | Makoto Ochi v Lee, Young Seok | 6-3,6-4 |
| ITF M15 Anning | 2019/01/14 05:30 | Grigoriy Lomakin v Lee, Young Seok | 6-1,4-6,13-11 |
| ITF M15 Anning | 2019/01/14 01:30 | Lee, Young Seok v Ruikai Wang | 6-3,5-7,10-3 |