| US Open | 2019/07/11 22:00 | Dong Keun Lee v Koki Watanabe | W | 2-1 |
| US Open | 2019/07/11 00:25 | Dong Keun Lee v Zeqi Zhou | W | 2-0 |
| Canada Open | 2019/07/03 18:30 | Dong Keun Lee v Sheng Po Yu | L | 0-2 |
| Australian Open | 2019/06/05 03:00 | Sai Praneeth B. v Dong Keun Lee | L | 2-0 |
| Sudirman Cup | 2019/05/22 04:00 | Tien Chen Chou v Dong Keun Lee | L | 2-0 |
| Asia Championships | 2019/04/24 02:00 | Kento Momota v Dong Keun Lee | L | 2-0 |
| Singapore Open | 2019/04/10 06:40 | Jan O Jorgensen v Dong Keun Lee | L | 2-0 |
| Malaysia Open | 2019/04/03 06:00 | Khosit Phetpradab v Dong Keun Lee | L | 2-0 |
| US Open | 2019/07/11 22:10 | Shifeng Li v Chun-Yi Lin | W | 1-2 |
| US Open | 2019/07/10 22:00 | Ygor Coelho v Chun-Yi Lin | W | 0-2 |
| US Open - Kvalifikation | 2019/07/09 20:55 | Haichao Liu v Chun-Yi Lin | W | 1-2 |
| US Open - Kvalifikation | 2019/07/09 19:35 | Chun-Yi Lin v Lino Munoz | W | 2-0 |
| Canada Open | 2019/07/05 00:10 | Kwang Hee Heo v Chun-Yi Lin | L | 2-1 |
| Canada Open | 2019/07/03 17:10 | Yu Igarashi v Chun-Yi Lin | W | 0-2 |
| Canada Open | 2019/07/03 02:30 | Imran Wadia v Chun-Yi Lin | W | 0-2 |
| Finnish Open | 2019/04/07 07:30 | Chun-Yi Lin v Kunlavut Vitidsarn | L | 1-2 |