| Luxembourg Open Qual | 05/02 16:25 | - | Koppen, Dennis v 홈, 디틀레프 예거 | L | 0-2 | |
| Luxembourg Open Qual | 05/02 13:30 | - | 코, 지아 웨이 조엘 v Koppen, Dennis | W | 1-2 | |
| Dutch Int. Qual | 03/14 09:00 | - | Ngan, Heng Lin v Koppen, Dennis | - | View | |
| Spanish Int. | 11/14 16:20 | - | Jakob Houe v Koppen, Dennis | L | 2-1 | |
| Czech Open | 10/20 08:20 | - | 그네에트, 볼프강 v Koppen, Dennis | L | 2-0 | |
| Dutch Open (GP) 2016 | 10/13 14:25 | - | Koppen, Dennis v 드와카효, 에이드 레스키 | L | 0-2 | |
| Dutch Open (GP) 2016 | 10/12 13:55 | - | Koppen, Dennis v Sanjeevi Vasudevan | W | 2-1 | |
| Dutch Open (GP) 2017, Qualification | 10/11 17:50 | - | Koppen, Dennis v Karl Sufryd | W | 2-0 | |
| Dutch Open (GP) 2017, Qualification | 10/11 14:00 | - | Koppen, Dennis v 루세브, 이반 | W | 2-1 | |
| Dutch Open (GP) 2017, Qualification | 10/11 12:20 | - | Koppen, Dennis v 로즈, 이선 | - | Walkover | |
| Bonn Int. Qual | 06/01 07:00 | - | Kim Kristensen, D. v Koppen, Dennis | - | View | |
| Bonn Int. Qual | 05/31 17:20 | - | James Robertson v Koppen, Dennis | W | 0-2 | |
| Bonn Int. Qual | 05/31 09:45 | - | David Silva v Koppen, Dennis | W | 0-2 | |
| Luxembourg Open Qual | 05/04 14:50 | - | Simon Baron-Vezilier v Koppen, Dennis | L | 2-0 | |
| Luxembourg Open Qual | 05/04 12:15 | - | Kian-Yu Oei v Koppen, Dennis | W | 0-2 | |
| Luxembourg Open Qual | 05/04 08:00 | - | 올슨, 루드비히 페트레 v Koppen, Dennis | W | 0-2 | |
| Dutch Int. | 04/14 10:20 | - | 코에니그, 조엘 v Koppen, Dennis | L | 2-0 | |
| Dutch Int. Qual | 04/13 20:00 | - | Ze Xi Sean Ngu v Koppen, Dennis | W | 0-2 | |
| Dutch Int. Qual | 04/13 14:05 | - | Koppen, Dennis v Zack Bobrowski | W | 2-0 | |
| Dutch Int. Qual | 04/13 08:20 | - | 에리슨, 키스 마크 v Koppen, Dennis | W | 0-2 | |
| Slovenia Future Series | 11/25 15:20 | - | 다니엘락, 마테우스 v Koppen, Dennis | L | 2-1 | |
| Hungarian Int. Qual | 11/02 12:00 | - | Kayan, Cholan v Koppen, Dennis | L | 2-0 | |
| 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 |