Stadium: Court 3 Round: 54 Ground: Clay
| ITF M25 Eupen | 2021/09/08 15:30 | Simon Beaupain v Alexander Hoogmartens | 7-5,3-6,6-3 |
| ITF M15 Oldenzaal | 2021/08/20 16:35 | Guy Den Heijer v Alexander Hoogmartens | 6-3,6-7,6-4 |
| ITF M15 Oldenzaal | 2021/08/19 12:45 | Alexander Hoogmartens v Ryan Nijboer | 1-6,7-5,6-3 |
| ITF M15 Oldenzaal | 2021/08/18 07:55 | Alexander Hoogmartens v Deney Wassermann | 2-6,7-6,6-0 |
| UTR Pro Tennis Series Mulheim | 2021/07/31 08:30 | Vasile Antonescu v Alexander Hoogmartens | 5-7,7-6,6-1 |
| UTR Pro Tennis Series Mulheim | 2021/07/30 13:30 | Guy Den Heijer v Alexander Hoogmartens | 6-2,3-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/07/30 07:00 | Francesco Vilardo v Alexander Hoogmartens | 1-6,2-5 |
| UTR Pro Tennis Series Mulheim | 2021/07/29 08:30 | Jim Hendrikx v Alexander Hoogmartens | 4-6,3-6 |
| UTR Pro Tennis Series Amsterdam | 2022/03/05 12:00 | Thorsten Sollie v Marcel Zielinski | 5-7,3-6 |
| UTR Pro Tennis Series Amsterdam | 2022/03/04 09:00 | Thorsten Sollie v Jesse De Jager | 6-4,3-6,5-3 |
| UTR Pro Tennis Series Amsterdam | 2022/03/03 09:00 | Thorsten Sollie v Hugo Pierre | 6-4,6-2 |
| UTR Pro Tennis Series Amsterdam | 2022/03/02 10:30 | Olivier Rojas v Thorsten Sollie | 6-7,6-2,6-3 |
| UTR Pro Tennis Series Amsterdam | 2022/03/01 09:00 | Michiel de Krom v Thorsten Sollie | 3-6,6-4,1-6 |
| 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 | Maxence Broville v Thorsten Sollie | 7-5,3-6,0-6 |
| UTR Pro Tennis Series Amsterdam | 2021/11/04 09:00 | Teun Rozenberg v Thorsten Sollie | 1-6,4-6 |