| 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 |
| Swiss Open | 2019/03/14 17:30 | Dan Lin v Dong Keun Lee | L | 2-0 |
| Swiss Open | 2019/03/13 20:20 | Dong Keun Lee v Rasmus Gemke | W | 2-0 |
| All England Open | 2019/03/06 11:15 | Jonatan Christie v Dong Keun Lee | L | 2-0 |
| Canada Open | 2019/07/03 01:30 | Sheng Po Yu v Seyed Mohammad Hossein Vakili | W | 2-0 |
| Osaka Int. Qual | 2019/04/03 04:30 | Takuma Kawamoto v Sheng Po Yu | L | 2-0 |
| China Masters | 2019/03/12 12:00 | Sheng Po Yu v Chih Chieh Yang | L | 1-2 |
| Swiss Open WD Qual | 2019/03/12 06:15 | Sheng Po Yu v Kuan-Ting Lin | W | 2-0 |
| Swiss Open WD Qual | 2019/03/12 02:10 | Sheng Po Yu v Zheng Xing Wang | W | 2-0 |