| Thomas Cup | 04/30 09:40 | - | Shi Feng Li v Yun Gyu Lee | L | 2-0 | |
| Thomas Cup | 04/28 06:20 | - | Yun Gyu Lee v Jack Yu | W | 2-0 | |
| Korea Masters Qual | 11/07 01:00 | 4 | Wan Ho Son v Yun Gyu Lee | D | Retired | |
| KL Masters | 11/02 06:35 | 4 | Chia Hao Lee v Yun Gyu Lee | L | 2-0 | |
| KL Masters | 11/01 06:00 | 5 | Adham H Elgamal v Yun Gyu Lee | W | 0-2 | |
| KL Masters | 11/01 05:00 | - | Adham H Elgamal v Yun Gyu Lee | W | 0-2 | |
| KL Masters | 10/31 10:35 | 6 | Yun Gyu Lee v Keith Mark Edison | W | 2-0 | |
| Korea Open | 07/19 10:45 | 5 | Yun Gyu Lee v Cheuk Yiu Lee | L | 0-2 | |
| Korea Open Qual | 07/18 04:00 | - | Yun Gyu Lee v Kah Kit Kan | W | 2-0 | |
| Korea Open Qual | 07/18 01:00 | - | Geonyeop Cho v Yun Gyu Lee | W | 1-2 | |
| Sudirman Cup | 05/21 07:20 | - | Yu Qi Shi v Yun Gyu Lee | L | 2-0 | |
| Sudirman Cup | 05/19 02:55 | - | Tien Chen Chou v Yun Gyu Lee | L | 2-0 | |
| Sudirman Cup | 05/14 02:20 | - | Yun Gyu Lee v Christo Popov | L | 0-2 | |
| Indonesia Masters | 10/18 11:00 | 6 | Jia Heng Jason Teh v Yun Gyu Lee | L | 2-0 | |
| Thomas Cup | 05/12 13:20 | - | Yun Gyu Lee v Rasmus Gemke | L | 0-2 | |
| Thomas Cup | 05/11 08:20 | - | Syabda Perkasa Belawa v Yun Gyu Lee | L | 2-1 | |
| Thomas Cup | 05/09 13:20 | - | Yun Gyu Lee v Jia Wei Joel Koh | L | 1-2 | |
| Thomas Cup | 05/08 13:20 | - | Yun Gyu Lee v Sitthikom Thammasin | L | 0-2 | |
| Korea Masters | 04/13 03:40 | 5 | Victor Svendsen v Yun Gyu Lee | L | 2-1 | |
| Swiss Open WD Qual | 11/27 01:00 | - | Mathew Fogarty v Yun Gyu Lee | L | 1-0 | |
| Swiss Open WD Qual | 09/25 02:47 | - | Yun Gyu Lee v Yu Hsien Lin | L | 0-2 | |
| Giraldilla Int. XD | 09/05 06:05 | 5 | Sourabh Verma v Yun Gyu Lee | L | 2-0 | |
| Giraldilla Int. XD | 09/04 13:30 | 6 | Yun Gyu Lee v Kartik Jindal | W | 2-0 |