| TT Cup (2023) | 08/24 15:20 | - | Vlastimil Kocvara v Karel Kastner | L | 3-2 | |
| TT Cup (2023) | 08/24 14:50 | - | Zdenek Bron v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 08/19 09:20 | - | Vladimir Libovicky v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 08/19 08:50 | - | Karel Kastner v Tomas Cerveny Jnr | W | 3-2 | |
| TT Cup (2023) | 08/19 07:20 | - | Petr Litomisky v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 08/19 06:50 | - | Vladimir Libovicky v Karel Kastner | L | 3-2 | |
| TT Cup (2023) | 08/13 13:50 | - | David Nosek v Karel Kastner | L | 3-0 | |
| TT Cup (2023) | 08/13 12:50 | - | Karel Kastner v Pavel Vyvial | L | 1-3 | |
| TT Cup (2023) | 08/13 11:20 | - | Ivo Hladik v Karel Kastner | W | 2-3 | |
| TT Cup (2023) | 08/13 10:50 | - | David Nosek v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 08/12 09:20 | - | Pavel Vyvial v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 08/12 08:20 | - | Karel Kastner v David Nosek | L | 2-3 | |
| TT Cup (2023) | 08/12 07:20 | - | Karel Kastner v Vojtech Antos | L | 1-3 | |
| TT Cup (2023) | 08/12 06:20 | - | Karel Kastner v Pavel Vyvial | W | 3-2 | |
| TT Cup (2023) | 08/05 09:20 | - | Karel Kastner v David Nosek | W | 3-2 | |
| TT Cup (2023) | 08/05 08:50 | - | Karel Kastner v Vladimir Libovicky | L | 1-3 | |
| TT Cup (2023) | 08/05 07:20 | - | Zdenek Bron v Karel Kastner | L | 3-0 | |
| TT Cup (2023) | 08/05 06:50 | - | David Nosek v Karel Kastner | W | 2-3 | |
| TT Cup (2023) | 07/15 17:20 | - | David Nosek v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 07/15 16:50 | - | Karel Kastner v Vladimir Libovicky | L | 2-3 | |
| TT Cup (2023) | 07/15 15:20 | - | Zdenek Bron v Karel Kastner | L | 3-2 | |
| TT Cup (2023) | 07/15 14:50 | - | David Nosek v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 07/12 17:50 | - | Jan Eibich v Karel Kastner | W | 2-3 | |
| TT Cup (2023) | 07/12 16:20 | - | Vlastimil Kocvara v Karel Kastner | W | 0-3 | |
| TT Cup (2023) | 07/12 15:50 | - | Vladimir Libovicky v Karel Kastner | W | 0-3 | |
| TT Cup (2023) | 07/12 14:50 | - | Karel Kastner v Jan Eibich | L | 2-3 | |
| TT Cup (2023) | 07/09 17:20 | - | Pavel Vyvial v Karel Kastner | W | 0-3 | |
| TT Cup (2023) | 07/09 16:50 | - | Karel Kastner v Vladimir Libovicky | W | 3-2 | |
| TT Cup (2023) | 07/09 15:20 | - | Ivo Hladik v Karel Kastner | L | 3-0 | |
| TT Cup (2023) | 07/09 14:50 | - | Pavel Vyvial v Karel Kastner | L | 3-2 |