| Hungarian Int. | 10/30 10:40 | - | Leon Seiwald v Viktor Petrovic | L | 1-2 | |
| Hungarian Int. | 10/29 20:10 | - | David Silva v Leon Seiwald | W | 0-2 | |
| Hungarian Int. | 10/29 17:35 | - | Nikolaj Sogaard v Leon Seiwald | W | 1-2 | |
| Czech Open | 10/16 16:05 | - | William Bogebjerg v Leon Seiwald | L | 2-0 | |
| Czech Open | 10/16 07:50 | - | Leon Seiwald v Mathias Solgaard | W | 2-1 | |
| Croatian Int. | 09/27 15:00 | - | Guzman/Rotaeche v Leon Seiwald | L | 2-0 | |
| Croatian Int. | 09/27 09:05 | - | Dominik Kopriva v Leon Seiwald | W | 1-2 | |
| Croatian Int. | 09/26 18:10 | - | Soren Hald v Leon Seiwald | W | Retired | |
| Croatian Int. | 09/26 08:30 | - | Mark Korosa v Leon Seiwald | W | 0-2 | |
| Slovenia Future Series Qual | 09/03 08:20 | - | Arthur Chardain v Leon Seiwald | L | 2-0 | |
| Czech Int. | 06/21 07:00 | - | Leon Seiwald v Mikkel Langemark | L | 0-2 | |
| Czech Int. | 06/20 07:00 | - | Leon Seiwald v Michael Tomic | W | 2-0 |