| Giraldilla Int. XD | 04/06 07:30 | 1 | Kai Schaefer v Eetu Heino | L | 0-2 | |
| Giraldilla Int. XD | 03/28 13:50 | 5 | Kai Schaefer v Gurusaidutt R.M.V. | L | 0-2 | |
| Giraldilla Int. XD | 03/10 10:00 | 1 | Victor Svendsen v Kai Schaefer | L | 2-0 | |
| Giraldilla Int. XD | 03/09 18:15 | 1 | Kai Schaefer v Andy Tsai | W | 2-1 | |
| Giraldilla Int. XD | 02/21 09:20 | 5 |
Kantaphon Wangcharoen
v
Kai Schaefer |
L | 2-0 | |
| Indonesia Masters XD | 02/17 14:00 | 1 | Emil Holst v Kai Schaefer | W | 0-2 | |
| Indonesia Masters XD | 02/16 14:45 | 1 | Kai Schaefer v Milan Ludik | W | 2-1 | |
| Giraldilla Int. XD | 12/15 14:20 | 1 | Kim Bruun v Kai Schaefer | L | 2-0 | |
| Giraldilla Int. XD | 12/15 09:30 | 1 | Kai Schaefer v Kieran Merrilees | W | 2-1 | |
| Giraldilla Int. XD | 12/07 10:30 | 1 | Kai Schaefer v Adrian Dziolko | L | 0-2 | |
| Giraldilla Int. XD | 12/06 14:00 | 1 | Kai Schaefer v Joshua Magee | W | 2-1 | |
| Indonesia Masters XD | 11/01 19:15 | 5 | Kai Schaefer v Khosit Phetpradab | L | 0-2 | |
| Indonesia Masters XD | 10/31 18:20 | 6 | Kai Schaefer v Dmytro Zavadsky | W | 2-0 | |
| Swiss Open WD Qual | 10/24 14:40 | 1 | Kai Schaefer v Thomas Rouxel | L | 0-2 | |
| Swiss Open WD Qual | 10/24 09:20 | 1 | Pierrick Cajot v Kai Schaefer | W | 0-2 | |
| Indonesia Masters XD | 10/11 19:00 | 5 |
Kai Schaefer v
Pablo Abian
|
L | 0-2 | |
| Dutch Open | 10/11 08:00 | 6 | Thomas Rouxel v Kai Schaefer | W | 0-2 | |
| Indonesia Masters XD | 04/25 13:15 | 6 | Toby Penty v Kai Schaefer | L | 2-0 | |
| Giraldilla Int. XD | 04/07 07:40 | 1 | Thomas Rouxel v Kai Schaefer | L | 2-0 | |
| Giraldilla Int. XD | 03/31 09:05 | 1 | Kai Schaefer v Vladimir Malkov | L | 0-2 | |
| All England Open | 02/28 19:00 | 6 |
Kai Schaefer v
Kalle Koljonen
|
L | 1-2 | |
| Giraldilla Int. XD | 01/14 08:43 | - | Toby Penty v Kai Schaefer | L | 2-1 | |
| Giraldilla Int. XD | 01/13 16:40 | - | Felix Burestedt v Kai Schaefer | W | 0-2 | |
| Indonesia Masters XD | 12/15 16:21 | - | Henri Hurskainen v Kai Schaefer | L | 2-0 | |
| Indonesia Masters XD | 12/03 10:43 | - |
Kai Schaefer v
Pablo Abian
|
L | 1-2 | |
| Indonesia Masters XD | 11/23 18:50 | 6 | Kai Schaefer v Ching Hung Kuo | L | 0-2 | |
| All England Open | 11/03 17:50 | 4 |
Kai Schaefer v
Yuqi Shi
|
L | 0-2 | |
| All England Open | 11/02 19:30 | 5 | Maciej Poulakowski v Kai Schaefer | W | 0-2 | |
| All England Open | 11/01 17:40 | 6 | Kai Schaefer v Emil Holst | W | 2-0 | |
| Dutch Open | 10/12 19:55 | 5 | Milan Ludik v Kai Schaefer | L | 2-1 |
Wikipedia - Kai Schäfer
Kai Hendrik Schäfer (born 13 June 1993) is a German badminton player. He competed at the 2020 Tokyo Olympics.