| Portugal Int. - Herrdubbel | 2024/03/08 14:20 | Dumler/Seibel v Chen/Lin | L | 0-2 |
| Portugal Int. - Herrdubbel - Kval | 2024/03/07 20:00 | Dumler/Seibel v Ivancic/Koscak | W | 2-0 |
| Portugal Int. - Herrdubbel - Kval | 2024/03/07 16:30 | Almeida/Chang v Dumler/Seibel | W | 1-2 |
| Lettland - Int. - Herrdubbel | 2023/09/02 13:20 | Datko/Schlevoigt v Dumler/Seibel | L | 2-0 |
| Lettland - Int. - Herrdubbel | 2023/09/02 07:40 | Dumler/Seibel v Gardon/Goulin | W | 2-1 |
| Lettland - Int. - Herrdubbel | 2023/09/01 15:00 | Dumler/Seibel v Li/Li | W | 2-1 |
| Lithuanian Int. - Herrdubbel | 2023/06/11 08:20 | Dumler/Seibel v Al Farizi/Joaquin | L | 0-2 |
| Lithuanian Int. - Herrdubbel | 2023/06/10 17:00 | Gardon/Lovang v Dumler/Seibel | W | 1-2 |