| Belarus Int. | 2019/08/30 10:40 | Raul Must v Leon Seiwald | L | 2-1 |
| Slovenia Int. Qual | 2019/05/15 08:30 | Leon Seiwald v B.M. Rahul Bharadwaj | L | 0-2 |
| Swiss Open WD Qual | 2019/02/21 09:10 | Bobby Setiabudi v Leon Seiwald | L | 2-0 |
| Swiss Open WD Qual | 2018/12/13 13:45 | Mikkel Enghoj v Leon Seiwald | W | 0-1 |
| Swiss Open WD Qual | 2018/12/13 08:30 | Christopher Grimley v Leon Seiwald | W | 0-2 |
| Giraldilla Int. XD | 2018/11/02 09:55 | Jesper Toft v Leon Seiwald | L | 2-1 |
| Swiss Open WD Qual | 2018/09/27 12:10 | Artyom Savatyugin v Leon Seiwald | W | 0-2 |
| Polish Int. | 2018/09/22 12:45 | Iikka Heino v Leon Seiwald | L | 2-1 |
| Croatian Int. | 2019/04/19 14:10 | Gergo Pytel v Leo Rossi | L | 0-2 |
| Swiss Open WD Qual | 2019/03/07 10:10 | Christopher Klauer v Gergo Pytel | W | 0-2 |
| Swiss Open WD Qual | 2019/01/17 12:00 | Gergo Pytel v Peter Correl | L | 1-2 |
| Swiss Open WD Qual | 2019/01/10 11:00 | Gergo Pytel v Kristjan Taherand | W | 2-1 |
| Giraldilla Int. XD | 2018/11/15 10:30 | David K Kristensen v Gergo Pytel | L | 2-0 |
| Swiss Open WD Qual | 2018/11/01 11:25 | Borko Petrovic v Gergo Pytel | W | 0-2 |
| Giraldilla Int. XD | 2017/04/12 12:04 | Gergo Pytel v Ciar Pringle | W | 2-0 |