| World Championships | 2018/08/01 09:00 | Yuqi Shi v Rajiv Ouseph | L | 2-0 |
| World Championships | 2018/07/30 02:50 | Zvonimir Durkinjak v Rajiv Ouseph | W | 0-2 |
| Thailand Open | 2018/07/12 10:05 | Khosit Phetpradab v Rajiv Ouseph | L | 2-0 |
| Thailand Open | 2018/07/11 04:40 | Rajiv Ouseph v Yun Hu | W | 2-1 |
| Indonesia Open | 2018/07/03 03:30 | Yuqi Shi v Rajiv Ouseph | L | 2-1 |
| All England Open | 2018/06/26 06:00 | Yuqi Shi v Rajiv Ouseph | L | 2-0 |
| Indonesia Masters XD | 2018/04/29 11:30 | Viktor Axelsen v Rajiv Ouseph | L | 2-0 |
| Indonesia Masters XD | 2018/04/28 12:00 | Rajiv Ouseph v Jan O Jorgensen | W | 2-1 |
| Polish Int. | 2018/09/23 14:00 | Harsheel Dani v Kai Schaefer | W | 1-2 |
| Polish Int. | 2018/09/23 09:20 | Iikka Heino v Kai Schaefer | W | 0-2 |
| Polish Int. | 2018/09/22 12:00 | Rasmus Messerschmidt v Kai Schaefer | W | 0-2 |
| Giraldilla Int. XD | 2018/08/29 12:50 | Yu Igarashi v Kai Schaefer | L | 2-0 |
| World Championships | 2018/07/31 09:40 | Kai Schaefer v Hans-Kristian Vittinghus | L | 1-2 |
| Swiss Open WD Qual | 2018/07/17 00:55 | Kai Schaefer v Firman Abdul Kholik | L | 1-2 |
| Giraldilla Int. XD | 2018/06/20 19:40 | Sitthikom Thammasin v Kai Schaefer | L | 2-0 |
| Giraldilla Int. XD | 2018/06/20 01:00 | Kevin Cordon v Kai Schaefer | W | 0-2 |