| Dutch International - Kvalifikation | 2019/04/11 07:05 | Robby Bronselaer v Mattias Sonderskov | W | 0-2 |
| Swiss Open - Kvalifikation - Damedouble | 2019/02/27 07:00 | Luke Pearce v Mattias Sonderskov | L | 2-0 |
| Swiss Open - Kvalifikation - Damedouble | 2018/11/28 11:30 | Andrew Heinemann v Mattias Sonderskov | L | 2-1 |
| Swiss Open - Kvalifikation - Damedouble | 2018/04/12 10:35 | Mattias Sonderskov v Aram Mahmoud | L | 0-2 |
| Indonesia Masters - Mixdouble | 2017/10/31 17:00 | Mattias Sonderskov v Christoph Offermann | L | 0-2 |
| Swiss Open - Kvalifikation - Damedouble | 2017/10/31 10:00 | Thiyagarajan Purusothaman v Mattias Sonderskov | W | 0-2 |
| Swiss Open - Kvalifikation - Damedouble | 2018/11/01 11:25 | Borko Petrovic v Gergo Pytel | L | 0-2 |