| Hellas International - Mixdouble | 2021/09/03 13:25 | Yap/Siow v Mueller/Stern | L | 2-0 |
| Hellas International - Mixdouble | 2021/09/03 06:00 | Mueller/Stern v Tores/Vercelot | W | 2-0 |
| Latvia International - Mixdouble | 2021/08/28 07:00 | Mueller/Stern v Azman/Low | L | 0-2 |
| Latvia International - Mixdouble | 2021/08/27 10:00 | Mueller/Stern v Xu/Christensen | W | 2-0 |
| Denmark Masters - Mixdouble | 2021/08/06 07:00 | Ivancic/Polanc v Mueller/Stern | L | 2-1 |
| Spain International - Mixdouble | 2021/06/18 13:00 | Mueller/Stern v Birker/Hochmeir | L | 1-2 |
| Spain International - Mixdouble | 2021/06/18 07:45 | Mueller/Stern v De Wit/Van Wijlick | W | 2-0 |
| Spain International - Mixdouble | 2021/06/17 11:40 | Mueller/Stern v Magee/Boyle | W | 2-1 |
| Denmark Masters - Mixdouble | 2021/08/06 07:00 | Vestergaard/Anthonisen v Bugtrup/Bergstein | L | 2-1 |