| World Championships MD | 2021/12/15 09:00 | Monroy J / Piris C v Lamsfuss/Seidel | W | 0-2 |
| Indonesia Open MD | 2021/11/23 06:25 | Chia/Soh v Lamsfuss/Seidel | L | 2-0 |
| Hylo Open MD | 2021/11/02 16:10 | Lamsfuss/Seidel v Grimley/Grimley | L | 0-2 |
| Open de France - Doubles Hommes | 2021/10/28 17:00 | Gideon M F / Sukamuljo K S v Lamsfuss/Seidel | L | 2-0 |
| Open de France - Doubles Hommes | 2021/10/26 08:50 | Lamsfuss/Seidel v Tan C T / Tan W G | W | 2-0 |
| Denmark Open MD | 2021/10/23 09:20 | Hoki/Kobayashi v Lamsfuss/Seidel | L | 2-1 |
| Denmark Open MD | 2021/10/22 15:30 | Ong/Teo v Lamsfuss/Seidel | W | 0-2 |
| Denmark Open MD | 2021/10/21 15:00 | Lee/Yang v Lamsfuss/Seidel | W | 0-2 |
| World Championships MD | 2021/12/13 11:10 | Flaatten/Rikheim v Birker P / Stipsits D | W | 2-0 |
| Scottish Open MD | 2021/11/26 18:20 | Garaga/Panjala v Flaatten/Rikheim | L | 2-0 |
| Scottish Open MD | 2021/11/26 11:40 | Mohd Sani M A / Mohd Sani M A v Flaatten/Rikheim | W | 0-2 |
| Cyprus Int. MD | 2021/10/15 14:10 | Flaatten/Rikheim v Ioannou/Pissis | W | 2-0 |
| Bulgarian Int. MD | 2021/10/09 08:45 | Gupta/Yap v Flaatten/Rikheim | L | 2-1 |
| Ukraine Int. MD | 2021/09/09 09:20 | Hess D / Volker J C v Flaatten/Rikheim | L | 2-0 |
| Ukraine Int. MD | 2021/09/08 11:40 | Filimon/Pratama v Flaatten/Rikheim | W | 1-2 |
| Latvia Int. MD | 2021/08/28 10:30 | Arif/Haikal v Flaatten/Rikheim | L | 2-0 |