Stadium: Court F Round: 25 Ground: Hardcourt indoor
| Challenger Shenzhen 2 | 2019/10/29 03:10 | Soonwoo Kwon v Duckhee Lee | 6-2,6-2 |
| Challenger Shenzhen 2 | 2019/10/28 05:10 | Kaichi Uchida v Duckhee Lee | 5-7,1-6 |
| Challenger Liuzhou | 2019/10/22 03:35 | Duckhee Lee v Jie Cui | 2-6,4-6 |
| ATP Winston-Salem | 2019/08/20 19:10 | Duckhee Lee v Hubert Hurkacz | 6-4,0-6,3-6 |
| ATP Winston-Salem | 2019/08/19 19:00 | Duckhee Lee v Henri Laaksonen | 7-6,6-1 |
| Challenger Vancouver | 2019/08/14 17:00 | Duckhee Lee v Malek Jaziri | 6-2,4-6,1-6 |
| Challenger Vancouver | 2019/08/13 17:00 | Duckhee Lee v Maverick Banes | 6-1,6-4 |
| Challenger Aptos | 2019/08/05 19:55 | Maxime Janvier v Duckhee Lee | 6-4,4-6,6-4 |
| Challenger Kobe | 2019/11/04 07:00 | Shintaro Imai v Seita Watanabe | 6-4,6-2 |
| Challenger Ningbo | 2019/10/14 05:55 | Shintaro Imai v Fajing Sun | 4-6,4-6 |
| ITF M25 Tay Ninh | 2019/10/08 03:45 | Naoki Nakagawa v Shintaro Imai | 6-2,6-1 |
| Challenger Kaohsiung | 2019/09/16 06:30 | Shintaro Imai v Renta Tokuda | 3-6,4-6 |
| Challenger Shanghai | 2019/09/09 06:25 | Arjun Kadhe v Shintaro Imai | 7-6,6-3 |
| Challenger Jinan | 2019/09/02 03:40 | Shintaro Imai v Chun Hsin Tseng | 5-7,6-4,2-6 |
| Challenger Yokkaichi | 2019/08/08 04:05 | Shintaro Imai v James Duckworth | 2-6,3-6 |
| Challenger Yokkaichi | 2019/08/06 02:50 | Nam Hoang Ly v Shintaro Imai | 6-2,2-6,3-6 |