| European Championships - Herrdubbel | 2021/04/29 10:40 | Lamsfuss/Seidel v Grimley/Grimley | W | 2-1 |
| French Open - Herrdubbel | 2021/10/28 17:00 | Fernaldi Gideon/Sukamuljo v Lamsfuss/Seidel | L | 2-0 |
| French Open - Herrdubbel | 2021/10/26 08:50 | Lamsfuss/Seidel v Tan/Tan | W | 2-0 |
| Denmark Open - Herrdubbel | 2021/10/23 09:20 | Hoki/Kobayashi v Lamsfuss/Seidel | L | 2-1 |
| Denmark Open - Herrdubbel | 2021/10/22 15:30 | Ong/Teo v Lamsfuss/Seidel | W | 0-2 |
| Denmark Open - Herrdubbel | 2021/10/21 15:00 | Lee/Yang v Lamsfuss/Seidel | W | 0-2 |
| Denmark Open - Herrdubbel | 2021/10/20 09:00 | Lamsfuss/Seidel v Ahsan/Setiawan | W | 2-0 |
| Thomas Cup - Herrdubbel | 2021/10/11 17:20 | Astrup/Rasmussen v Lamsfuss/Seidel | W | 0-2 |
| Sudirman Cup - Herrdubbel | 2021/09/28 08:30 | Lee/Yang v Lamsfuss/Seidel | L | 2-0 |
| Belgian Int. - Herrdubbel | 2021/10/29 08:20 | Boe/Kjaer v Grimley/Grimley | L | 2-1 |
| Belgian Int. - Herrdubbel | 2021/10/28 16:20 | Trinkajee/Viriyangkura v Grimley/Grimley | W | 0-2 |
| Dutch Open - Herrdubbel | 2021/10/15 13:00 | Adam/Lovang v Grimley/Grimley | L | 2-0 |
| Dutch Open - Herrdubbel | 2021/10/14 18:35 | Chong/Ling v Grimley/Grimley | W | 0-2 |
| Denmark Masters - Herrdubbel | 2021/08/06 15:20 | Grimley/Grimley v Eipe/Kjaer | L | 0-2 |
| Denmark Masters - Herrdubbel | 2021/08/06 11:00 | Grimley/Grimley v Rusev/Stoynov | W | 2-0 |
| Spain Masters - Herrdubbel | 2021/05/18 12:40 | Corvee/Labar v Grimley/Grimley | L | 2-0 |
| European Championships - Herrdubbel | 2021/04/29 10:40 | Lamsfuss/Seidel v Grimley/Grimley | L | 2-1 |