Head to Head
| All England Open | 2017/02/28 19:00 | Kai Schaefer v Kalle Koljonen | L | 1-2 |
Home History
| Malaysia Masters Qual | 2022/07/05 02:00 | Hongyang Weng v Kai Schaefer | L | 2-0 |
| Nantes Int. | 2022/06/24 07:00 | Seng Zoe Yeoh v Kai Schaefer | L | 2-0 |
| Thailand Open | 2022/05/19 07:40 | Kai Schaefer v Zii Jia Lee | L | 0-2 |
| Thailand Open | 2022/05/18 10:00 | Thomas Rouxel v Kai Schaefer | W | 0-2 |
| Thomas Cup | 2022/05/11 07:40 | Kai Schaefer v Jason Anthony Ho-Shue | W | 2-0 |
| Thomas Cup | 2022/05/09 07:40 | Tzu Wei Wang v Kai Schaefer | L | 2-1 |
| Thomas Cup | 2022/05/08 02:40 | Srikanth Kidambi v Kai Schaefer | L | 2-1 |
| European Championships | 2022/04/26 11:00 | Kai Schaefer v Anders Antonsen | L | 1-2 |
Away History
| European Championships | 2022/04/26 10:20 | Mark Caljouw v Kalle Koljonen | L | 2-1 |
| Korea Masters | 2022/04/14 01:00 | Misha Zilberman v Kalle Koljonen | L | 2-1 |
| Korea Masters | 2022/04/12 05:00 | Kalle Koljonen v Joo Wan Kim | W | 2-0 |
| Korea Open | 2022/04/05 03:30 | Kalle Koljonen v Tze Yong Ng | L | 0-2 |
| Swiss Open | 2022/03/24 12:20 | Kalle Koljonen v H.S. Prannoy | L | 1-2 |
| Swiss Open | 2022/03/23 14:20 | Kalle Koljonen v Toby Penty | W | 2-0 |
| German Open | 2022/03/09 11:30 | Kwang Hee Heo v Kalle Koljonen | L | 2-1 |
| India Open | 2022/01/13 07:10 | Kalle Koljonen v Sergey Sirant | L | 0-2 |