| Hellas Int. Qual | 2019/05/02 12:30 | Nicolas A. Mueller v Mattias Sonderskov | L | 2-0 |
| Croatian Int. Qual | 2019/04/18 09:20 | Mattias Sonderskov v Borko Petrovic | L | 1-2 |
| Dutch Int. Qual | 2019/04/11 07:05 | Robby Bronselaer v Mattias Sonderskov | W | 0-2 |
| Swiss Open WD Qual | 2019/02/27 07:00 | Luke Pearce v Mattias Sonderskov | L | 2-0 |
| Swiss Open WD Qual | 2018/11/28 11:30 | Andrew Heinemann v Mattias Sonderskov | L | 2-1 |
| Swiss Open WD Qual | 2018/04/12 10:35 | Mattias Sonderskov v Aram Mahmoud | L | 0-2 |
| Indonesia Masters XD | 2017/10/31 17:00 | Mattias Sonderskov v Christoph Offermann | L | 0-2 |
| Swiss Open WD Qual | 2017/10/31 10:00 | Thiyagarajan Purusothaman v Mattias Sonderskov | W | 0-2 |
| Denmark Int. Qual | 2019/05/09 12:20 | Julien Carraggi v Magnus Johannesen | L | 2-1 |