Stadium: Court 4 Round: 62
| ITF M15 Platja D'Aro | 2021/10/10 11:00 | Niels Visker v Pedro Iamachkine | 7-5,6-3 |
| ITF M25 - Eupen | 2021/09/09 10:45 | Matteo Arnaldi v Niels Visker | 7-6,6-2 |
| ITF M25 - Eupen | 2021/09/08 11:55 | Niels Visker v Loic Cloes | 7-6,6-4 |
| ITF M25 Marburg | 2021/07/05 14:25 | Niels Visker v Amaury Raynel | 5-7,4-6 |
| ITF M25 - Den Haag | 2021/06/30 10:00 | Niels Visker v Joao Lucas Reis da Silva | 6-4,4-6,4-6 |
| ITF M25 - Alkmaar | 2021/06/20 18:00 | Deney Wassermann v Niels Visker | 7-6,6-7,10-6 |
| ITF M15 - Skopje | 2021/06/02 09:55 | Niels Visker v Ryan Nijboer | 6-4,3-6,4-6 |
| ITF M15 - Skopje | 2021/06/01 08:00 | Niels Visker v Tom Gentzsch | 6-4,6-1 |
| ITF M15 Platja D'Aro | 2021/10/11 08:30 | Noah Lopez v Eero Vasa | 3-6,2-6 |
| ITF M15 Platja D'Aro | 2021/10/10 10:00 | Xavier Gabarro v Eero Vasa | 6-4,0-6,5-10 |
| ITF M15 Platja D'Aro | 2021/10/05 08:30 | Matvey Minin v Eero Vasa | 3-6,7-6,10-8 |
| ITF M15 Platja D'Aro | 2021/10/04 11:00 | Nil Boixader Roca v Eero Vasa | 2-6,1-6 |
| ITF M15 Platja D'Aro | 2021/10/03 11:00 | Pedro Rodenas v Eero Vasa | 6-7,6-3,5-10 |
| ITF M15 - Bratislava | 2021/08/25 10:05 | Eero Vasa v Lukas H Lilleengen | 5-7,7-6,5-7 |
| ITF M15 - Bratislava | 2021/08/24 08:00 | Eero Vasa v Adria Soriano Barrera | 6-3,2-6,10-5 |
| ITF M15 - Bratislava | 2021/08/23 09:00 | Eero Vasa v Simon Habsuda | 6-1,6-1 |