| Tennis Point Exhibition Series | 2020/07/15 08:10 | Dominik Fritsche v Daniel Vishnick | 3-6,6-3,6-7 |
| Tennis Point Exhibition Series | 2020/07/14 15:05 | Dominik Fritsche v Florian Broska | 2-6,2-6 |
| 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 |
| Challenger Noumea | 2018/12/31 04:05 | Daniel Masur v Frederik Nielsen | 6-1,5-7,6-4 |
| Challenger Fairfield | 2018/10/08 17:00 | Kevin King v Frederik Nielsen | 6-4,6-3 |