| Hellas Int. XD | 2021/09/05 07:00 | Yap/Siow v Mork C C / Joergensen S F | W | 2-0 |
| Hellas Int. XD | 2021/09/04 14:00 | Ivancic/Polanc v Yap/Siow | W | 1-2 |
| Hellas Int. XD | 2021/09/04 07:00 | Perez/Leal v Yap/Siow | W | 0-2 |
| Hellas Int. XD | 2021/09/03 13:25 | Yap/Siow v Mueller/Stern | W | 2-0 |
| Latvia Int. XD | 2021/08/29 07:00 | Yap/Siow v Trecki/Swierczynska | W | 2-1 |
| Latvia Int. XD | 2021/08/28 07:30 | Fredholm/Corsini v Yap/Siow | W | 0-2 |
| Latvia Int. XD | 2021/08/27 10:30 | Yap/Siow v Mork C C / Joergensen S F | W | 2-0 |
| Ukraine Int. XD | 2021/09/08 08:00 | Yakovlev/Tkach v Birker P / Hochmeir K | W | 1-2 |
| Spain Int XD | 2021/06/19 07:00 | Hemming C / Pugh J v Birker P / Hochmeir K | L | 2-0 |
| Spain Int XD | 2021/06/18 13:00 | Mueller/Stern v Birker P / Hochmeir K | W | 1-2 |
| Spain Int XD | 2021/06/18 07:45 | Leal/Lopez v Birker P / Hochmeir K | W | 0-2 |
| Austrian Open - Doubles Mixtes | 2021/05/28 11:00 | Choong/Toh v Birker P / Hochmeir K | L | 2-1 |
| Slovenia Int. XD | 2021/05/21 10:00 | Birker P / Hochmeir K v Knudsen/Norrman | L | 0-2 |
| Slovenia Int. XD | 2021/05/21 08:00 | Birker P / Hochmeir K v Doder/Loncar | W | 2-1 |
| Slovenia Int. XD | 2021/05/20 08:00 | Birker P / Hochmeir K v Wassink/Laurens | W | 2-0 |