| Giraldilla Int. XD | 2018/09/23 14:00 | Harsheel Dani v Kai Schaefer | W | 1-2 |
| Giraldilla Int. XD | 2018/09/23 09:20 | Iikka Heino v Kai Schaefer | W | 0-2 |
| Giraldilla Int. XD | 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 |
| All England Open | 2018/07/31 09:40 | Kai Schaefer v Hans-Kristian Vittinghus | L | 1-2 |
| Swiss Open - čtyřhra ženy - kvalifikace | 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 |
| Giraldilla Int. XD | 2018/09/14 17:30 | Subhankar Dey v Victor Svendsen | L | 0-2 |
| Giraldilla Int. XD | 2018/09/13 16:20 | Lucas Claerbout v Subhankar Dey | W | 0-2 |
| Giraldilla Int. XD | 2018/08/29 10:10 | Misha Zilberman v Subhankar Dey | L | 2-1 |
| Giraldilla Int. XD | 2018/07/27 06:00 | Subhankar Dey v Vladimir Malkov | L | 0-2 |
| Giraldilla Int. XD | 2018/07/26 03:20 | Siddharth Pratap Singh v Subhankar Dey | W | 0-2 |
| Giraldilla Int. XD | 2018/07/25 04:40 | Ajay Jayaram v Subhankar Dey | W | 1-2 |
| Indonesia Masters - smíšená čtyřhra | 2018/07/19 08:40 | Tien Chen Chou v Subhankar Dey | L | 2-0 |
| Indonesia Masters - smíšená čtyřhra | 2018/07/18 08:10 | Subhankar Dey v Jason Anthony Ho-Shue | W | 2-1 |