| Tennis Point Exhibition Series | 2020/07/17 14:40 | Sebastian Mortier v Constantin Schmitz | 3-6,0-6 |
| Tennis Point Exhibition Series | 2020/07/16 16:15 | Sebastian Mortier v Benjamin Hassan | 1-6,1-6 |
| Tennis Point Exhibition Series | 2020/07/15 11:10 | Sebastian Mortier v Florian Broska | 2-6,1-6 |
| Tennis Point Exhibition Series | 2020/07/14 07:00 | Sebastian Mortier v Daniel Vishnick | 6-1,6-2 |
| ITF M15 Wetzlar | 2019/08/05 08:00 | Tejas Chaukulkar v Sebastian Mortier | 6-3,6-4 |
| ITF Germany F10 Qual | 2016/08/07 15:00 | Benjamin Hassan v Sebastian Mortier | 6-2,6-2 |
| ITF Germany F10 Qual | 2016/08/07 11:00 | Sebastian Mortier v Phillip Schellhorn | 6-4,6-2 |
| Tennis Point Exhibition Series | 2020/07/17 09:25 | Sebastian Fanselow v Frederik Nielsen | 6-3,6-7,2-6 |
| Tennis Point Exhibition Series | 2020/07/16 11:45 | Dominik Fritsche v Frederik Nielsen | 1-6,2-6 |
| Tennis Point Exhibition Series | 2020/07/15 14:05 | Julien Penzlin v Frederik Nielsen | 2-6,1-6 |
| Tennis Point Exhibition Series | 2020/07/14 09:50 | Julian Worn v Frederik Nielsen | 3-6,1-6 |
| Davis Cup | 2020/03/07 12:40 | Frederik Nielsen v Ignacio Garcia | 7-6,6-2 |
| ATP New York | 2020/02/09 20:30 | Go Soeda v Frederik Nielsen | 6-1,6-2 |
| Challenger Phoenix | 2019/03/13 18:40 | Frederik Nielsen v Peter Polansky | 6-7,3-6 |
| Challenger Phoenix | 2019/03/11 17:00 | Frederik Nielsen v Fabrice Martin | 6-4,7-6 |