Stadium: C Round: 45 Ground: Hardcourt outdoor
| ITF Spain F20 | 2018/07/24 08:00 | Pol Toledo Bague v Diego Hidalgo | 6-1,6-1 |
| ITF Spain F19 | 2018/07/20 14:00 | Diego Hidalgo v Raul Brancaccio | 6-1,5-7,2-6 |
| ITF Spain F19 | 2018/07/19 14:00 | Jaume Pla Malfeito v Diego Hidalgo | 6-4,2-6,4-6 |
| ITF Spain F19 | 2018/07/17 14:00 | Diego Hidalgo v Samuel M Arjona | 6-1,6-0 |
| ITF Spain F18 | 2018/07/12 14:15 | Javier Barranco Cosano v Diego Hidalgo | 6-2,6-7,6-2 |
| ITF Spain F18 | 2018/07/10 11:30 | Diego Hidalgo v Billy Harris | 5-7,7-5,6-4 |
| ITF Tunisia F25 | 2018/06/28 08:30 | Johan Nikles v Diego Hidalgo | 6-4,6-4 |
| ITF Tunisia F25 | 2018/06/27 10:20 | Issam Haitham Taweel v Diego Hidalgo | 1-6,0-6 |
| ITF Spain F12 | 2018/05/24 09:00 | Nicolas Alvarez Varona v Sergio Martos Gornes | 4-6,6-7 |
| ITF Spain F12 | 2018/05/23 10:40 | Nicolas Alvarez Varona v Jordi Mas De Ugarte | 6-2,6-2 |
| ATP Madrid Qual | 2018/05/05 16:35 | Nicolas Alvarez Varona v Mirza Basic | 6-3,6-7,2-6 |
| ITF Spain F9 | 2018/04/19 09:00 | Patricio Heras v Nicolas Alvarez Varona | 6-7,6-3,6-2 |
| ITF Spain F9 | 2018/04/18 13:40 | Jordan Correia v Nicolas Alvarez Varona | 5-7,5-7 |
| ITF Spain F9 Qual | 2018/04/16 11:10 | Nicolas Alvarez Varona v Federico Moreno | 7-5,7-6 |
| ITF Spain F9 Qual | 2018/04/15 10:30 | Oleg Prihodko v Nicolas Alvarez Varona | 2-6,2-6 |
| ITF Spain F9 Qual | 2018/04/14 12:15 | Nicolas Alvarez Varona v Adrian Exposito | 6-1,6-0 |