| Dutch Open (GP) 2016 | 10/13 08:35 | - | 버레스트, 펠릭스 v Koppen, Dennis | L | 2-0 | |
| Dutch Open (GP) 2017, Qualification | 10/12 08:45 | - | Koppen, Dennis v 소넨슈인, 아론 | W | 2-1 | |
| Spanish Int. | 09/13 13:40 | - | Koppen, Dennis v Sacha Leveque | L | 0-2 | |
| Bonn Int. Qual | 06/15 14:10 | - | 벨로와, 시압다 페르카사 v Koppen, Dennis | L | 2-0 | |
| Bonn Int. Qual | 06/15 09:30 | - | Koppen, Dennis v David Silva | W | 2-0 | |
| Lithuanian Int. Qual | 06/09 07:45 | - | 바그다나비시우스, 빌리우스 v Koppen, Dennis | W | 0-2 | |
| Luxembourg Open | 05/06 11:40 | - | Koppen, Dennis v 요하네센, 매그너스 | L | 0-2 | |
| Luxembourg Open | 05/06 08:20 | - | 아벨라, 매튜 v Koppen, Dennis | W | 0-2 | |
| Luxembourg Open Qual | 05/05 16:20 | - | Koppen, Dennis v Lorrain Joliat | W | 2-0 | |
| Luxembourg Open Qual | 05/05 14:20 | - | Koppen, Dennis v 올슨, 루드비히 페트레 | W | 2-0 | |
| Dutch Int. Qual | 04/13 19:40 | - | Koppen, Dennis v Christian Faust Kjaer | L | 0-2 | |
| Dutch Int. Qual | 04/13 11:00 | - | Koppen, Dennis v 이반크, 미하 | W | 2-0 | |
| Slovak Open Qual | 03/03 09:20 | - | Koppen, Dennis v Dominik Kwinta | L | 0-2 | |
| Slovak Open Qual | 03/02 16:20 | - | Koppen, Dennis v 올슨, 루드비히 페트레 | W | 2-0 | |
| Slovak Open Qual | 03/02 11:40 | - | Koppen, Dennis v Max Svensson | W | 2-0 | |
| Swedish Open Qual | 01/20 09:00 | - | Koppen, Dennis v Moeller, Mads Juel | L | 1-2 | |
| Italian Int. Qual | 12/16 14:25 | - | Koppen, Dennis v 가우딘, 야니스 | L | 1-2 | |
| Slovenia Future Series Qual | 11/25 19:30 | - | Victor Ørding Kauffmann v Koppen, Dennis | L | 2-0 | |
| Hellas Open Qual | 08/08 11:15 | - | Koppen, Dennis v Ng, Tze Yong | L | 0-2 | |
| Hellas Open Qual | 08/08 08:55 | - | Koppen, Dennis v 베케토프, 글리브 | W | 2-0 | |
| Hellas Open Qual | 08/08 07:30 | - | Koppen, Dennis v Choo, K. Q. | W | 2-0 |