Stadium: Hard 21 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2021/06/02 13:50 | Nicolas Alvarez Varona v Matteo De Vincentis | 6-4,6-2 |
| ITF M15 Marbella | 2021/05/29 07:55 | Yannick Mertens v Nicolas Alvarez Varona | 1-6,7-5,6-3 |
| ITF M15 Marbella | 2021/05/28 08:00 | Nicolas Alvarez Varona v Imanol L Morillo | 6-2,4-6,6-4 |
| ITF M15 Marbella | 2021/05/27 09:00 | Nicolas Alvarez Varona v Max Alcala Gurri | 6-4,6-1 |
| ITF M15 Marbella | 2021/05/26 13:55 | Nicolas Alvarez Varona v Luis Diego Chavez Villalpando | 6-2,6-1 |
| ITF M15 Valldoreix | 2021/05/12 12:05 | Alex M Pujolras v Nicolas Alvarez Varona | 6-7,6-2,6-1 |
| ITF M15 Valldoreix | 2021/05/11 08:00 | Nicolas Alvarez Varona v Oleg Prihodko | 6-7,6-4,11-9 |
| ITF M15 Valldoreix | 2021/05/10 08:00 | Nicolas Alvarez Varona v Axel Garcian | 6-1,6-4 |
| ITF M15 Heraklion | 2021/06/01 08:00 | Aristotelis Thanos v Martin Breysach | 3-6,3-6 |
| ITF M15 Heraklion | 2021/05/26 11:55 | Yshai Oliel v Martin Breysach | 6-2,6-0 |
| ITF M15 Sibenik | 2021/05/19 17:05 | Martin Breysach v Jose Fco. Vidal Azorin | 6-4,3-6,2-6 |
| ITF M15 Sibenik | 2021/05/18 08:00 | Jaimee Floyd Angele v Martin Breysach | 7-5,6-1 |
| ITF M15 Sibenik | 2021/05/17 11:00 | Martin Zeljenka v Martin Breysach | 6-7,3-6 |
| ITF M15 Sibenik | 2021/05/16 10:00 | Rafael Kis Balazs v Martin Breysach | 0-6,4-6 |
| ITF M15 Majadahonda | 2021/05/02 16:15 | Alexis Musialek v Martin Breysach | 6-1,6-1 |
| ITF M15 Las Palmas | 2021/04/25 14:30 | Rafael Giotis v Martin Breysach | 5-7,6-2,10-4 |