Stadium: Court 7 Round: 25 Ground: Hardcourt outdoor
| Davis Cup | 2018/09/15 15:25 | Xavier Lawrence v Diego Hidalgo | 0-6,1-6 |
| ITF Spain F24 | 2018/08/23 15:20 | Diego Hidalgo v Miguel Semmler | 3-6,6-1,3-6 |
| ITF Spain F24 | 2018/08/22 10:10 | Diego Hidalgo v Quim Sorni Chavarria | 6-2,6-4 |
| ITF Spain F24 | 2018/08/20 13:40 | Martin Cuevas v Diego Hidalgo | 3-6,4-6 |
| ITF Spain F22 | 2018/08/10 17:55 | Diego Hidalgo v David Perez Sanz | 5-7,4-6 |
| ITF Spain F22 | 2018/08/08 17:00 | Diego Hidalgo v Marco Brugnerotto | 6-1,6-3 |
| ITF Spain F22 | 2018/08/07 18:20 | Diego Hidalgo v Luis Diego Chavez Villalpando | 6-2,6-4 |
| Challenger Segovia Qual | 2018/07/28 11:00 | Diego Hidalgo v Nicolas Alvarez Varona | 3-6,4-6 |
| ITF Netherlands F1 | 2018/06/28 15:00 | Guy Den Heijer v Botic Van De Zandschulp | 2-6,5-7 |
| ITF Netherlands F1 | 2018/06/26 13:35 | Guy Den Heijer v Maxime Pauwels | 7-5,4-6,7-6 |
| ITF Belgium F1 | 2018/06/19 08:00 | Paul Woerner v Guy Den Heijer | 7-6,4-6,7-5 |
| ITF Poland F4 | 2018/05/25 08:00 | Dante Gennaro v Guy Den Heijer | 6-0,6-2 |
| ITF Poland F4 | 2018/05/24 08:00 | Marcin Gawron v Guy Den Heijer | 1-6,3-6 |
| ITF Poland F4 | 2018/05/22 07:30 | Santiago Besada v Guy Den Heijer | 6-4,1-6,1-6 |
| ITF Poland F1 | 2018/05/04 13:00 | Guy Den Heijer v Michael Vrbensky | 7-6,2-6,3-6 |
| ITF Poland F1 | 2018/05/03 09:00 | Guy Den Heijer v Piotr Grynkowski | 6-1,6-2 |