| UTR Pro Tennis Series Hillerod | 2022/02/15 14:00 | Sergio Redondo v Jurriaan Bol | 6-4,7-5 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 12:30 | Caspar Jalili Mikkelsen v Sergio Redondo | 6-3,5-7,3-6 |
| UTR Pro Tennis Series Barcelona | 2022/02/05 08:30 | Sergio Redondo v Jean-Christian Morandais | 3-6,0-6 |
| UTR Pro Tennis Series Barcelona | 2022/02/03 08:30 | Miguel Fernando Pereira v Sergio Redondo | 1-1 |
| UTR Pro Tennis Series Barcelona | 2022/02/02 08:00 | Hugo Pierre v Sergio Redondo | 6-3,3-6,3-6 |
| UTR Pro Tennis Series Barcelona | 2022/02/01 12:30 | Yurii Dzhavakian v Sergio Redondo | 4-6,7-6,6-0 |
| UTR Pro Tennis Series Barcelona | 2022/01/30 15:00 | Thomas Laurent v Sergio Redondo | 6-1,5-1 |
| UTR Pro Tennis Series Barcelona | 2021/12/19 09:00 | Grigoriy Lomakin v Sergio Redondo | 6-4,6-5 |
| UTR Pro Tennis Series Hillerod | 2022/02/14 11:00 | Kevin Chahoud v Frederik Nielsen | 6-4,6-7,0-6 |
| ATP Doha | 2021/03/06 09:00 | Frederik Nielsen v Ramkumar Ramanathan | 4-6,1-6 |
| Tennis Point Exhibition Series | 2020/07/18 11:35 | Sebastian Mortier v Frederik Nielsen | 4-6,3-6 |
| 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 |