| Open della Corea del Sud - Qual. | 2019/09/24 01:40 | Brice Leverdez v Dong Keun Lee | W | 1-2 |
| Open di Taipei Cinese | 2019/09/04 08:35 | Dong Keun Lee v Wing Ki Vincent Wong | L | 1-2 |
| Campionati mondiali | 2019/08/20 10:00 | Sai Praneeth B. v Dong Keun Lee | L | 2-0 |
| Campionati mondiali | 2019/08/19 19:30 | Dong Keun Lee v Daniel Fan | W | 2-0 |
| Open di Thailandia | 2019/07/31 08:20 | Dong Keun Lee v Tien Chen Chou | L | 0-2 |
| Open di Giappone | 2019/07/24 08:30 | Dong Keun Lee v Tien Chen Chou | L | 0-2 |
| US Open | 2019/07/13 02:30 | Dong Keun Lee v Chun-Yi Lin | L | 0-2 |
| US Open | 2019/07/11 22:00 | Dong Keun Lee v Koki Watanabe | W | 2-1 |
| Open della Corea del Sud - Qual. | 2019/09/24 01:40 | Donghun Kim v Ji Hoon Choi | W | 2-1 |
| Open del Vietnam - Qual. | 2019/09/10 09:05 | Donghun Kim v Saran Jamsri | L | 0-2 |
| Open del Vietnam - Qual. | 2019/09/10 04:00 | Chien-Wei Chiang v Donghun Kim | W | 0-2 |
| Masters di Akita | 2019/08/16 01:05 | Firman Abdul Kholik v Donghun Kim | L | 2-1 |
| Masters di Akita | 2019/08/15 04:30 | Donghun Kim v Suppanyu Avihingsanon | W | 2-0 |
| Hyderabad Open | 2019/08/07 13:30 | Parupalli Kashyap v Donghun Kim | L | 2-1 |
| Hyderabad Open | 2019/08/07 03:30 | Donghun Kim v Siril Verma | W | 2-1 |
| Hyderabad Open Qual | 2019/08/06 11:50 | Hemanth M.Gowda v Donghun Kim | W | 0-2 |