| TT Cup (2023) | 07/06 13:50 | - | Karel Kastner v Jan Spiegel | W | 3-2 | |
| TT Cup (2023) | 07/06 12:50 | - | Vaclav Nykl v Karel Kastner | W | 0-3 | |
| TT Cup (2023) | 07/06 11:50 | - | Karel Kastner v Jan Spiegel | W | 3-2 | |
| TT Cup (2023) | 07/06 10:20 | - | Pavel Vilhelm v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 07/04 09:50 | - | Antos Vojtech v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 07/04 08:50 | - | Jan Zalesky v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 07/04 07:50 | - | Karel Kastner v Vojtech Antos | L | 1-3 | |
| TT Cup (2023) | 07/04 06:20 | - | David Mutl v Karel Kastner | W | 0-3 | |
| TT Cup (2023) | 07/02 13:50 | - | Jakub Jares v Karel Kastner | L | 3-0 | |
| TT Cup (2023) | 07/02 12:50 | - | Jan Framberk v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 07/02 11:50 | - | Karel Kastner v Jakub Jares | L | 2-3 | |
| TT Cup (2023) | 07/02 10:20 | - | David Mutl v Karel Kastner | W | 2-3 | |
| TT Cup (2023) | 06/28 17:50 | - | Vladimir Libovicky v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 06/28 16:50 | - | Karel Kastner v Vladimir Libovicky | L | 0-3 | |
| TT Cup (2023) | 06/28 15:20 | - | Vlastimil Kocvara v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 06/28 14:50 | - | Vojtech Strouhal v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 06/22 17:20 | - | Karel Kastner v Vlastimil Kocvara | W | 3-2 | |
| TT Cup (2023) | 06/22 16:50 | - | Karel Kastner v David Mutl | W | 3-2 | |
| TT Cup (2023) | 06/22 15:20 | - | Vlastimil Kocvara v Karel Kastner | W | 1-3 | |
| TT Cup (2023) | 06/22 14:50 | - | Zdenek Bron v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 06/17 17:20 | - | Karel Kastner v David Mutl | W | 3-2 | |
| TT Cup (2023) | 06/17 16:50 | - | Karel Kastner v David Mutl | W | 3-1 | |
| TT Cup (2023) | 06/17 15:20 | - | Vladimir Libovicky v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 06/17 14:50 | - | Zdenek Bron v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 06/17 13:20 | - | Zdenek Bron v Karel Kastner | W | 2-3 | |
| TT Cup (2023) | 06/17 12:20 | - | Jan Zalesky v Karel Kastner | L | 3-2 | |
| TT Cup (2023) | 06/17 11:50 | - | Zdenek Bron v Karel Kastner | L | 3-1 | |
| TT Cup (2023) | 06/17 10:50 | - | Karel Kastner v David Mutl | W | 3-2 | |
| TT Cup (2023) | 06/10 17:20 | - | Karel Kastner v Pavel Vilhelm | W | 3-2 | |
| TT Cup (2023) | 06/10 16:50 | - | Karel Kastner v David Mutl | W | 3-1 |