Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| Challenger Busan | 2017/05/18 05:35 | Duckhee Lee v Soonwoo Kwon | 7-6,6-7,4-6 |
| Challenger Seoul | 2017/05/13 03:35 | Duckhee Lee v Soonwoo Kwon | 3-6,0-6 |
| ITF Japan F3 | 2016/03/24 03:15 | Duckhee Lee v Soonwoo Kwon | 6-3,6-2 |
| Australian Open | 2019/01/08 02:55 | Gregoire Barrere v Duckhee Lee | 6-3,6-2 |
| Challenger Noumea | 2019/01/01 01:25 | Duckhee Lee v Hugo Nys | 6-4,4-6,2-6 |
| Australian Open WC | 2018/12/01 05:50 | Duckhee Lee v Zhe Li | 6-7,3-6 |
| Australian Open WC | 2018/11/30 06:30 | Duckhee Lee v Renta Tokuda | 6-4,6-4 |
| Australian Open WC | 2018/11/29 04:40 | Duckhee Lee v Hanyi Liu | 6-1,6-2 |
| Challenger Liuzhou | 2018/10/24 06:00 | Radu Albot v Duckhee Lee | 6-2,7-5 |
| Challenger Liuzhou | 2018/10/22 04:15 | Duckhee Lee v Tsung-Hua Yang | 6-2,6-3 |
| Challenger Tashkent | 2018/10/08 14:10 | Evgeny Karlovskiy v Duckhee Lee | 7-6,6-4 |
| Australian Open | 2019/01/09 00:30 | Yosuke Watanuki v Soonwoo Kwon | 7-5,6-4 |
| Challenger Kobe | 2018/11/16 04:50 | Yoshihito Nishioka v Soonwoo Kwon | 6-1,3-6,6-4 |
| Challenger Kobe | 2018/11/15 02:00 | Akira Santillan v Soonwoo Kwon | 2-6,7-5,6-7 |
| Challenger Kobe | 2018/11/14 03:20 | Renta Tokuda v Soonwoo Kwon | 3-6,6-1,1-6 |
| Challenger Shenzhen 2 | 2018/10/30 05:10 | Soonwoo Kwon v Tsung-Hua Yang | 5-7,3-6 |
| Challenger Kaohsiung | 2018/09/23 07:55 | Gael Monfils v Soonwoo Kwon | 6-4,2-6,6-1 |
| Challenger Kaohsiung | 2018/09/22 06:30 | Soonwoo Kwon v Malek Jaziri | 6-3,6-4 |
| Challenger Kaohsiung | 2018/09/21 06:00 | Soonwoo Kwon v Brayden Schnur | 6-3,6-4 |