| Swiss Open WD Qual | 2018/03/08 11:30 | Marcus Loo v Leon Seiwald | W | 1-2 |
| Swiss Open WD Qual | 2018/02/21 10:40 | David Peng v Leon Seiwald | L | 2-1 |
| Swiss Open WD Qual | 2017/12/05 14:26 | Leon Seiwald v Peter Correl | L | 1-2 |
| Indonesia Masters XD | 2017/05/22 02:20 | Zin Rei Ryan Ng v Leon Seiwald | L | 2-1 |
| Giraldilla Int. XD | 2017/03/09 21:47 | Douglas Lidman v Leon Seiwald | L | 2-0 |