Stadium: Court 5 Round: 62 Ground: Clay
| ITF M15 Valldoreix | 2021/05/13 10:10 | Rayane Roumane v Niels Visker | 6-4,2-6,6-4 |
| ITF M15 Valldoreix | 2021/05/12 08:00 | Georgii Kravchenko v Niels Visker | 6-7,1-6 |
| ITF M15 Valldoreix | 2021/05/11 08:00 | Niels Visker v Francisco Cabral | 7-5,6-0 |
| ITF M15 Valldoreix | 2021/05/10 09:00 | Pierre Delage v Niels Visker | 4-6,2-6 |
| ITF M15 Valldoreix | 2021/05/09 12:00 | Niels Visker v Alejandro Moro Canas | 3-6,6-2,10-6 |
| ITF M15 Majadahonda | 2021/05/06 08:30 | Georgii Kravchenko v Niels Visker | 2-6,6-3,6-2 |
| ITF M15 Majadahonda | 2021/05/05 07:00 | Dominic Stephan Stricker v Niels Visker | 6-3,3-6,3-6 |
| ITF M15 Majadahonda | 2021/05/03 14:30 | Niels Visker v Remy Bertola | 6-3,6-4 |
| ITF M15 Szkopje | 2021/05/30 07:00 | Lazar Milicevic v Strahinja Rakic | 5-7,6-0,10-4 |
| ITF M15 Brcko | 2021/05/21 09:25 | Matheus P De Almeida v Lazar Milicevic | 7-5,7-5 |
| ITF M15 Brcko | 2021/05/18 12:00 | Lazar Milicevic v Dusan Rajic | 7-6,6-4 |
| ITF M15 Brcko | 2021/05/18 07:00 | Yann Wojcik v Lazar Milicevic | 4-6,4-6 |
| ITF M15 Prijedor | 2021/05/11 08:00 | Kristijan Juhas v Lazar Milicevic | 6-3,6-0 |
| ITF M15 Prijedor | 2021/05/10 09:15 | Dusan Rajic v Lazar Milicevic | 2-6,2-6 |
| ITF M15 Prijedor | 2021/05/09 09:30 | Lazar Milicevic v Stefan Micov | 6-1,6-2 |