Stadium: 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 | Sabanin, Yan v Ryan Nijboer | 0-6,3-6 |
| ITF M25 The Hague | 2021/06/30 12:55 | Mateus Alves v Ryan Nijboer | 7-6,6-3 |
| ITF M15 Frederiksberg | 2021/08/04 07:50 | Hannestad, Benjamin v Gabriel Decamps | 6-4,6-2 |
| ITF M15 Vejle | 2021/07/26 14:00 | Gabriel Decamps v Hannestad, Benjamin | 0-6,7-6,10-6 |
| ITF M15 Vejle | 2021/07/25 09:00 | Hannestad, Benjamin v Nareyka, Bjorn | 6-1,6-2 |
| UTR Pro Tennis Series Copenhagen | 2021/06/20 09:30 | Dominik Palan v Hannestad, Benjamin | 4-6,3-5 |
| UTR Pro Tennis Series Copenhagen | 2021/06/19 08:30 | Hannestad, Benjamin v Yitbarek, Simon | 6-4,6-3 |
| UTR Pro Tennis Series Copenhagen | 2021/06/18 11:00 | Hannestad, Benjamin v Katic, Nikolaj | 6-4,6-1 |
| UTR Pro Tennis Series Copenhagen | 2021/06/16 08:00 | Hannestad, Benjamin v Klov Nilsson, Jesper | 6-2,5-2 |
| UTR Pro Tennis Series Copenhagen | 2021/06/15 08:00 | Hannestad, Benjamin v Daniel De Jonge | 4-6,5-7 |