Stadium: Cancha Central Round: 25 Ground: Clay
| Challenger Segovia Qual | 2018/07/28 11:00 | Diego Hidalgo v Nicolas Alvarez Varona | 3-6,4-6 |
| ITF M15 Heraklion | 2021/06/04 06:25 | Nicolas Alvarez Varona v Ugo Blanchet | 6-1,7-5 |
| ITF M15 Heraklion | 2021/06/03 09:30 | Nicolas Alvarez Varona v Martin Breysach | 6-3,6-3 |
| 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 M25 Santo Domingo | 2021/06/03 15:55 | Kyle Seelig v Diego Hidalgo | 6-2,6-4 |
| ITF M25 Santo Domingo | 2021/06/01 15:55 | Gerardo L Villasenor v Diego Hidalgo | 6-4,3-6,3-6 |
| Challenger Salinas 2 | 2021/04/27 16:15 | Adrian Menendez-Maceiras v Diego Hidalgo | 7-5,6-0 |
| Challenger Salinas | 2021/04/20 15:50 | Diego Hidalgo v Nicolas Mejia | 3-6,6-1,5-7 |
| ITF M25 Naples | 2021/02/26 15:55 | Corentin Denolly v Diego Hidalgo | 6-2,6-2 |
| ITF M25 Naples | 2021/02/25 18:10 | Diego Hidalgo v Louis Wessels | 6-2,6-4 |
| ITF M25 Naples | 2021/02/24 14:50 | Diego Hidalgo v Nick Chappell | 6-3,1-6,6-4 |
| Challenger Concepcion | 2021/02/14 18:35 | Rafael Matos v Diego Hidalgo | 7-5,6-1 |