| TT Cup (2023) | 10/11 12:50 | - | Christian Kratochvil v Jan Trefny | W | 1-3 | |
| TT Cup (2023) | 10/11 11:50 | - | Jan Trefny v Stepan Koci | L | 0-3 | |
| TT Cup (2023) | 10/11 10:20 | - | Vojtech Waldhauser v Jan Trefny | L | 3-1 | |
| TT Cup (2023) | 10/08 12:55 | - | Jan Trefny v Stepan Koci | L | 1-3 | |
| TT Cup (2023) | 10/08 11:55 | - | Jan Trefny v Jaroslav Dohnal | W | 3-0 | |
| TT Cup (2023) | 10/08 10:55 | - | Jan Trefny v Ondrej Knazik | L | 0-3 | |
| TT Cup (2023) | 10/06 18:00 | - | Pavel Verner v Jan Trefny | W | 0-3 | |
| TT Cup (2023) | 10/06 16:50 | - | Pavel Verner v Jan Trefny | L | 3-2 | |
| TT Cup (2023) | 10/06 15:50 | - | Jan Trefny v Zbynek Vyskocil | W | 3-2 | |
| TT Cup (2023) | 10/06 14:20 | - | Tomas Barsa v Jan Trefny | W | 1-3 | |
| TT Cup (2023) | 10/02 13:55 | - | Jan Trefny v Stepan Koci | L | 1-3 | |
| TT Cup (2023) | 10/02 12:20 | - | Jan Trefny v Christian Kratochvil | W | 3-2 | |
| TT Cup (2023) | 10/02 11:20 | - | Jan Trefny v Jaroslav Zamyslicky | W | 3-2 | |
| TT Cup (2023) | 10/02 10:20 | - | Jan Trefny v Stepan Koci | W | 3-2 | |
| TT Cup (2023) | 09/27 13:50 | - | Jan Trefny v Vladimir Milata Jnr | L | 0-3 | |
| TT Cup (2023) | 09/27 12:20 | - | Jan Trefny v Pavel Kocabek | L | 1-3 | |
| TT Cup (2023) | 09/27 11:20 | - | Jan Trefny v Jan Cernoch | W | 3-0 | |
| TT Cup (2023) | 09/27 10:20 | - | Jan Trefny v Vladimir Milata Jnr | W | 3-1 | |
| TT Cup (2023) | 09/22 13:20 | - | Jan Trefny v Josef Pistora | W | 3-0 | |
| TT Cup (2023) | 09/22 12:20 | - | Jan Trefny v Ondrej Knazik | L | 1-3 | |
| TT Cup (2023) | 09/22 11:20 | - | Jan Trefny v Josef Pistora | W | 3-1 | |
| TT Cup (2023) | 09/22 10:20 | - | Jan Trefny v Tomas Krejci | L | 2-3 | |
| TT Cup (2023) | 09/19 13:20 | - | Ondrej Knazik v Jan Trefny | L | 3-2 | |
| TT Cup (2023) | 09/19 12:20 | - | Jan Trefny v Roman Pokorny | L | 2-3 | |
| TT Cup (2023) | 09/19 11:20 | - | Jan Trefny v Christian Kratochvil | L | 0-3 | |
| TT Cup (2023) | 09/19 10:20 | - | Jan Trefny v Ondrej Knazik | L | 2-3 | |
| TT Cup (2023) | 09/18 13:20 | - | Josef Pistora v Jan Trefny | L | 3-0 | |
| TT Cup (2023) | 09/18 12:20 | - | Stepan Koci v Jan Trefny | L | 3-0 | |
| TT Cup (2023) | 09/18 11:50 | - | Roman Pokorny v Jan Trefny | W | 2-3 | |
| TT Cup (2023) | 09/18 10:50 | - | Jan Trefny v Josef Pistora | L | 1-3 |