| Chinese Taipei Open | 09/04 08:35 | 5 | Dong Keun Lee v Wing Ki Vincent Wong | L | 1-2 | |
| Majstrovstvá sveta | 08/20 10:00 | 5 | Sai Praneeth B. v Dong Keun Lee | L | 2-0 | |
| Majstrovstvá sveta | 08/19 19:30 | 6 | Dong Keun Lee v Daniel Fan | W | 2-0 | |
| Thailand Open | 07/31 08:20 | 5 | Dong Keun Lee v Tien Chen Chou | L | 0-2 | |
| Japan Open | 07/24 08:30 | 5 | Dong Keun Lee v Tien Chen Chou | L | 0-2 | |
| US Open | 07/13 02:30 | 3 | Dong Keun Lee v Chun-Yi Lin | L | 0-2 | |
| US Open | 07/11 22:00 | 4 | Dong Keun Lee v Koki Watanabe | W | 2-1 | |
| US Open | 07/11 00:25 | 5 | Dong Keun Lee v Zeqi Zhou | W | 2-0 | |
| Canada Open | 07/03 18:30 | 5 | Dong Keun Lee v Sheng Po Yu | L | 0-2 | |
| Australian Open | 06/05 03:00 | 5 | Sai Praneeth B. v Dong Keun Lee | L | 2-0 | |
| Sudirman Cup | 05/22 04:00 | - | Tien Chen Chou v Dong Keun Lee | L | 2-0 | |
| Asia Championships | 04/24 02:00 | 5 | Kento Momota v Dong Keun Lee | L | 2-0 | |
| Singapore Open | 04/10 06:40 | 5 | Jan O Jorgensen v Dong Keun Lee | L | 2-0 | |
| Malaysia Open | 04/03 06:00 | 5 | Khosit Phetpradab v Dong Keun Lee | L | 2-0 | |
| Swiss Open | 03/14 17:30 | 4 | Dan Lin v Dong Keun Lee | L | 2-0 | |
| Swiss Open | 03/13 20:20 | 5 | Dong Keun Lee v Rasmus Gemke | W | 2-0 | |
| All England Open | 03/06 11:15 | 5 | Jonatan Christie v Dong Keun Lee | L | 2-0 | |
| Giraldilla Int. XD | 11/29 05:50 | 4 | Dong Keun Lee v Ihsan Maulana Mustofa | L | 0-2 | |
| Giraldilla Int. XD | 11/28 03:00 | 5 | Dong Keun Lee v Kashyap Parupalli | W | 2-1 | |
| Indonesia Masters - zmiešaná štvorhra | 11/16 04:40 | 3 | Dong Keun Lee v Wan Ho Son | L | 0-2 | |
| Indonesia Masters - zmiešaná štvorhra | 11/15 10:30 | 4 | Dong Keun Lee v Jan O Jorgensen | W | 2-0 | |
| Indonesia Masters - zmiešaná štvorhra | 11/14 12:00 | 5 | Tien Chen Chou v Dong Keun Lee | W | 1-2 | |
| All England Open | 11/07 07:00 | 5 | Dong Keun Lee v Tien Chen Chou | L | 1-2 | |
| French Open | 10/25 12:40 | 4 | Srikanth Kidambi v Dong Keun Lee | L | 2-1 | |
| French Open | 10/24 08:30 | 5 | Khosit Phetpradab v Dong Keun Lee | W | 1-2 | |
| All England Open | 10/17 08:20 | 5 | Tien Chen Chou v Dong Keun Lee | L | 2-1 | |
| Indonesia Masters - zmiešaná štvorhra | 09/26 01:40 | 5 | Kwang Hee Heo v Dong Keun Lee | L | 2-0 | |
| All England Open | 09/18 04:00 | 5 | Jan O Jorgensen v Dong Keun Lee | L | 2-1 | |
| All England Open | 09/15 03:30 | 2 | Dong Keun Lee v Khosit Phetpradab | L | 0-2 | |
| All England Open | 09/14 01:30 | 3 | Srikanth Kidambi v Dong Keun Lee | W | 1-2 |