| Polish Int. XD | 2021/09/25 08:00 | Wassink/Tirtosentono v Birker P / Hochmeir K | L | 2-0 |
| Ukraine Int. XD | 2021/09/09 07:20 | Yap/Siow v Birker P / Hochmeir K | L | 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 |
| Polish Int. XD Qual | 2021/09/23 09:00 | Niczyporuk/Plawecka v Gnedt R / Polc U | L | 2-0 |
| Austrian Open - Doubles Mixtes | 2021/05/28 11:25 | Gnedt R / Polc U v Scheiel/Volkmann | L | 0-2 |
| Slovenia Int. XD | 2021/05/20 08:40 | Choong/Toh v Gnedt R / Polc U | L | 2-0 |
| Bulgarian Int. XD | 2020/10/02 11:40 | Tomic/Vitman v Gnedt R / Polc U | L | 2-0 |
| Italian Int. XD Qual | 2019/12/12 13:30 | Gnedt R / Polc U v Z-Bexell / Sjoo | L | 0-2 |
| Scottish Open XD | 2019/11/21 18:30 | Gnedt R / Polc U v Volker J C / Janssens E | L | 0-2 |
| Slovenia Int. XD | 2019/05/16 08:00 | Villeger W / Bauer S v Gnedt R / Polc U | L | 2-0 |
| Croatian Int. XD | 2019/04/19 07:00 | Christensen M / Syvertsen N v Gnedt R / Polc U | W | 0-2 |