Stadium: Court 6 Round: 26 Ground: Clay
| ITF M15 Oldenzaal | 2021/08/18 07:55 | Hoogmartens, Alexander v 바서만, 데니 | 2-6,7-6,6-0 |
| UTR Pro Tennis Series Mulheim | 2021/07/31 08:30 | 안토네스쿠, 바실 v Hoogmartens, Alexander | 5-7,7-6,6-1 |
| UTR Pro Tennis Series Mulheim | 2021/07/30 13:30 | 덴 헤이젤, 구이 v Hoogmartens, Alexander | 6-2,3-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/07/30 07:00 | 빌라르도, 프란세스코 v Hoogmartens, Alexander | 1-6,2-5 |
| UTR Pro Tennis Series Mulheim | 2021/07/29 08:30 | Jim Hendrikx v Hoogmartens, Alexander | 4-6,3-6 |
| UTR Pro Tennis Series Mulheim | 2021/07/28 12:30 | 함페, 스테판 페터 v Hoogmartens, Alexander | 2-6,1-6 |
| UTR Pro Tennis Series Mulheim | 2021/07/26 08:00 | 나우, 하젬 v Hoogmartens, Alexander | 6-4,5-4 |
| ITF M15 Gaiba | 2021/06/09 16:15 | Hoogmartens, Alexander v 베르투시올리, 페데리코 | 7-6,2-6,4-6 |
| ITF M15 Oldenzaal | 2021/08/18 12:45 | 데케르스, 알렉 v 니부어, 리얀 | 6-3,2-6,4-6 |
| ITF M15 Frederiksberg | 2021/08/05 10:00 | 니부어, 리얀 v Hannestad, Benjamin | 1-6,6-4,2-6 |
| ITF M15 Frederiksberg | 2021/08/04 09:25 | 니부어, 리얀 v Rivera, Leyton | 6-4,6-2 |
| ITF M15 Vejle | 2021/07/28 12:50 | 시그스가르드, 크리스티안 v 니부어, 리얀 | 6-3,6-2 |
| Challenger Amersfoort | 2021/07/13 10:15 | 니부어, 리얀 v 니클레스, 조한 | 6-7,2-6 |
| ITF M25 Marburg | 2021/07/10 11:00 | 니부어, 리얀 v 하드트, 니크 | 2-6,4-6 |
| ITF M25 Marburg | 2021/07/09 12:00 | 니부어, 리얀 v 웰트, 밀란 | 4-6,6-3,6-1 |
| ITF M25 Marburg | 2021/07/08 09:00 | 니부어, 리얀 v 핸델, 팀 | 6-3,6-4 |