| Spain International - Dublu Mixt | 2021/06/17 11:40 | Mueller/Stern v Magee/Boyle | W | 2-1 |
| Polish Open - Dublu Mixt | 2021/03/28 08:00 | Choong/Toh v Mueller/Stern | L | 2-0 |
| Polish Open - Dublu Mixt | 2021/03/27 16:00 | Mueller/Stern v Kargaev/Vorobeva | W | 2-1 |
| Polish Open - Dublu Mixt | 2021/03/27 08:20 | Sjoo/Z-Bexell v Mueller/Stern | W | 0-2 |
| Polish Open - Dublu Mixt | 2021/03/26 14:40 | Mueller/Stern v Szerecz/Gonda | W | 2-0 |
| Polish Open - Dublu Mixt | 2021/03/26 08:20 | Mueller/Stern v Holub/Basova | W | 2-0 |
| Spain International - Dublu Mixt - Calificari | 2021/06/17 07:00 | Olivares/Ivorra v De Wit/Van Wijlick | W | 1-2 |
| Spain International - Dublu Mixt - Calificari | 2021/06/16 11:00 | Garcia/Alvarez v De Wit/Van Wijlick | W | 0-2 |
| Slovenia Int. - Dublu Mixt | 2021/05/20 09:10 | De Wit/Van Wijlick v Hubacek/Basova | L | 0-2 |
| Slovenia Int. XD Qual | 2021/05/19 08:30 | De Wit/Van Wijlick v Massetti/Stiglich | W | 2-0 |