| Polish Int. | 2018/09/22 12:45 | Iikka Heino v Leon Seiwald | W | 2-1 |
| Polish Int. | 2018/09/21 15:10 | Dmytro Zavadsky v Iikka Heino | W | 1-2 |
| Polish Int. | 2018/09/21 10:30 | Bodhit Joshi v Iikka Heino | W | 0-2 |
| Giraldilla Int. XD | 2018/09/13 10:00 | Sam Parsons v Iikka Heino | L | 2-0 |
| Giraldilla Int. XD | 2018/05/12 14:30 | Pablo Abian v Iikka Heino | L | 2-0 |
| Giraldilla Int. XD | 2018/05/12 08:30 | Sam Parsons v Iikka Heino | W | 0-2 |
| Giraldilla Int. XD | 2018/05/11 09:00 | Iikka Heino v Aditya Joshi | W | 2-0 |
| Giraldilla Int. XD | 2018/04/06 07:15 | Abhishek Yeligar v Iikka Heino | W | 1-2 |
| 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 |
| All England Open | 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 |
| US Open | 2018/06/13 23:40 | Xiaodong Sheng v Kai Schaefer | L | 2-1 |
| Indonesia Masters XD | 2018/05/23 03:00 | Wing Ki Vincent Wong v Kai Schaefer | L | 2-1 |