| Giraldilla Int. XD | 09/19 07:06 | - | Sakai, Kazumasa v Lee, Dong Keun | W | 0-2 | |
| Giraldilla Int. XD | 09/19 02:27 | - | Lee, Dong Keun v Ygor Coelho | W | 2-0 | |
| Open d'Angleterre | 09/13 08:10 | 5 | Lee, Dong Keun v Anthony Sinisuka Ginting | L | 1-2 | |
| Indonesia Masters XD | 09/12 07:20 | 1 | Lee, Dong Keun v Kuncoro, Sony Dwi | W | 2-0 | |
| Indonesia Masters XD | 09/12 03:20 | 1 | Kim, Min Ki v Lee, Dong Keun | W | 1-2 | |
| Open d'Angleterre | 06/21 02:00 | 5 | Lin, Dan v Lee, Dong Keun | L | 2-0 | |
| Indonesia Masters XD | 06/12 08:23 | - | Holst, Emil v Lee, Dong Keun | L | 2-1 | |
| Open d'Angleterre | 04/26 08:00 | 5 | Lin, Dan v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 04/15 07:10 | 2 | Sai Praneeth, B. v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 04/14 08:00 | 3 | Jonatan Christie v Lee, Dong Keun | W | 0-2 | |
| Open d'Angleterre | 04/13 07:40 | 4 | Ka Long Angus NG v Lee, Dong Keun | W | 1-2 | |
| Open d'Angleterre | 04/12 01:45 | 5 | Lee, Dong Keun v Kuncoro, Sony Dwi | W | 2-1 | |
| Open d'Angleterre | 04/05 04:40 | 5 | Hyeok Jin Jeon v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 03/30 09:00 | 4 | Hans-Kristian Vittinghus v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 03/29 03:30 | 5 | Lee, Dong Keun v Kanta Tsuneyama | W | 2-0 | |
| Open d'Angleterre | 12/09 06:40 | 3 | Liew, Daren v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 12/08 07:40 | 4 | Shih, K. C. v Lee, Dong Keun | W | 0-2 | |
| Open d'Angleterre | 12/07 08:00 | 5 | Ludik, Milan v Lee, Dong Keun | W | 0-2 | |
| Open d'Angleterre | 12/06 08:50 | 6 | Choi, Young Woo v Lee, Dong Keun | W | 0-2 | |
| Open d'Angleterre | 09/28 04:00 | 5 | Huang, Y. X. v Lee, Dong Keun | L | 2-0 | |
| Open d'Angleterre | 09/22 04:20 | 4 | Lee, Dong Keun v Joergensen, J. O. | L | 0-2 | |
| Open d'Angleterre | 09/21 04:00 | 5 | Lee, Dong Keun v Leverdez, Brice | W | 2-0 |