Stadion: Court 6 Round: 26 Ground: Clay
| ITF - M15 - Frederiksberg | 2021/08/04 09:25 | Ryan Nijboer v Leyton Rivera | 6-4,6-2 |
| ITF - M15 - Vejle | 2021/07/28 12:50 | Christian Sigsgaard v Ryan Nijboer | 6-3,6-2 |
| Challenger - Amersfoort | 2021/07/13 10:15 | Ryan Nijboer v Johan Nikles | 6-7,2-6 |
| ITF - M25 - Marburg | 2021/07/10 11:00 | Ryan Nijboer v Nick Hardt | 2-6,4-6 |
| ITF - M25 - Marburg | 2021/07/09 12:00 | Ryan Nijboer v Milan Welte | 4-6,6-3,6-1 |
| ITF - M25 - Marburg | 2021/07/08 09:00 | Ryan Nijboer v Tim Handel | 6-3,6-4 |
| ITF - M25 - Marburg | 2021/07/07 09:00 | Yan Sabanin v Ryan Nijboer | 0-6,3-6 |
| ITF - M25 - Den Haag | 2021/06/30 12:55 | Mateus Alves v Ryan Nijboer | 7-6,6-3 |
| ITF - M15 - Frederiksberg | 2021/08/04 07:50 | Benjamin Hannestad v Gabriel Decamps | 6-4,6-2 |
| ITF - M15 - Vejle | 2021/07/26 14:00 | Gabriel Decamps v Benjamin Hannestad | 0-6,7-6,10-6 |
| ITF - M15 - Vejle | 2021/07/25 09:00 | Benjamin Hannestad v Bjorn Nareyka | 6-1,6-2 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/20 09:30 | Dominik Palan v Benjamin Hannestad | 4-6,3-5 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/19 08:30 | Benjamin Hannestad v Simon Yitbarek | 6-4,6-3 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/18 11:00 | Benjamin Hannestad v Nikolaj Katic | 6-4,6-1 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/16 08:00 | Benjamin Hannestad v Jesper Klov Nilsson | 6-2,5-2 |
| UTR Pro Tennis Series - Kopenhagen | 2021/06/15 08:00 | Benjamin Hannestad v Daniel De Jonge | 4-6,5-7 |