| UTR Pro Tennis Series - Amsterdam | 2021/12/10 07:00 | Tim Sandkaulen v Zachary Eisinga | 6-1,6-7,7-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/08 07:00 | Tim Sandkaulen v Jurriaan Bol | 4-6,7-5,6-4 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/07 08:30 | Tim Sandkaulen v Tibo Colson | 6-4,2-6,4-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/06 11:30 | Sem Verbeek v Tim Sandkaulen | 5-7,6-7 |
| ITF M25 - Hamborg | 2021/10/21 08:00 | Lenny Hampel v Tim Sandkaulen | 6-4,7-6 |
| ITF M25 - Hamborg | 2021/10/19 08:00 | Tim Sandkaulen v Marvin Moeller | 6-4,7-5 |
| ITF M25 - Hamborg | 2021/10/17 14:50 | Benjamin Dhoe v Tim Sandkaulen | 6-7,6-2,5-10 |
| ITF M25 - Hamborg | 2021/10/17 11:10 | Alen Moritz Hodzic v Tim Sandkaulen | 6-7,1-6 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/10 07:00 | Nathan De Veer v Miko Wassermann | 6-2,6-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/12/09 11:55 | Nathan De Veer v Niklas Koch | 6-1,6-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/06 16:00 | Nathan De Veer v Jip Van Assendelft | 2-6,3-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/04 09:00 | Nathan De Veer v Max Houkes | 0-6,6-4,6-3 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/03 09:00 | Nathan De Veer v Jesse Timmermans | 4-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/02 09:00 | Nathan De Veer v Thorsten Sollie | 3-6,3-5 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/01 12:00 | Nathan De Veer v Maxence Broville | 1-6,0-5 |