| Giraldilla Int. XD | 2018/06/20 19:40 | Thammasin, S. 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 | 2018/06/13 23:40 | Xiaodong Sheng v Kai Schaefer | L | 2-1 |
| Indonesia Masters XD | 2018/05/23 03:00 | Wong, Wing Ki Vincent v Kai Schaefer | L | 2-1 |
| Indonesia Masters XD | 2018/05/22 03:00 | Kenta Nishimoto v Kai Schaefer | L | 2-1 |
| Indonesia Masters XD | 2018/05/20 12:00 | Tien Chen Chou v Kai Schaefer | L | 2-0 |
| Indonesia Masters XD | 2018/04/24 09:00 | Nilsson, Jacob v Kai Schaefer | L | 2-0 |
| Giraldilla Int. XD | 2018/04/06 07:30 | Kai Schaefer v Heino, Eetu | L | 0-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/07/10 01:52 | Yadav Chittaboina, Rahul v Kholik, Firman Abdul | L | 2-1 |
| Indonesia Masters XD | 2018/05/23 09:00 | Kholik, Firman Abdul v Ha, Young Woong | W | 2-1 |
| Indonesia Masters XD | 2018/05/22 14:00 | Kholik, Firman Abdul v Thongnuam, Pannawit | W | 2-0 |
| Indonesia Masters XD | 2018/05/20 04:00 | Kholik, Firman Abdul v Dostie-Guidon, Paul-Antoine | W | 2-0 |
| Giraldilla Int. XD | 2018/05/01 23:30 | Heo, Kwang Hee v Kholik, Firman Abdul | L | 2-1 |
| China Masters | 2018/04/10 01:40 | Lin, Yu Hsien v Kholik, Firman Abdul | L | 2-0 |
| Indonesia Masters XD | 2018/02/10 12:00 | Lee, Dong Keun v Kholik, Firman Abdul | W | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/01/23 03:00 | Kantaphon Wangcharoen v Kholik, Firman Abdul | L | 2-1 |