| UTR Pro Tennis Series - Amsterdam | 2021/11/07 10:30 | Guy Den Heijer v Sem Verbeek | 6-3,6-3 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/06 13:30 | Thorsten Sollie v Sem Verbeek | 6-4,4-6,5-7 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/05 10:30 | Sem Verbeek v Mikhail Minakov | 6-2,6-3 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/03 12:00 | Sem Verbeek v Benjamin Dhoe | 6-3,6-4 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/02 13:30 | Sem Verbeek v Amadatus Admiraal | 6-2,6-2 |
| UTR Pro Tennis Series - Amsterdam | 2021/11/01 10:30 | Tom Clavel v Sem Verbeek | 6-2,4-6,4-6 |
| Challenger - Porto | 2021/06/29 16:40 | Sem Verbeek v Gastao Elias | 7-6,4-6,1-6 |
| Challenger - Porto | 2021/06/28 10:00 | Sem Verbeek v Francisco Cabral | 7-6,6-3 |
| 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 - Mülheim | 2021/10/16 08:00 | Tim Sandkaulen v Eric Vanshelboim | 0-0 |
| UTR Pro Tennis Series - Mülheim | 2021/10/15 08:30 | Yurii Dzhavakian v Tim Sandkaulen | 0-0 |
| UTR Pro Tennis Series - Mülheim | 2021/10/14 13:00 | Edison Ambarzumjan v Tim Sandkaulen | 3-6,0-5 |
| UTR Pro Tennis Series - Mülheim | 2021/10/13 10:00 | Jing L Weng v Tim Sandkaulen | 3-6,2-5 |