Stadium: Court 3 Round: 26 Ground: Clay
| ITF Peru F1 | 2018/09/24 15:00 | Luis Britto v Guido Ivan Justo | 1-6,1-6 |
| ITF Argentina F6 | 2018/09/19 14:45 | Gonzalo Villanueva v Guido Ivan Justo | 6-1,6-4 |
| ITF Argentina F6 | 2018/09/18 15:10 | Guido Ivan Justo v Santiago Rodriguez Taverna | 6-1,6-3 |
| ITF Argentina F6 | 2018/09/17 13:00 | Guido Ivan Justo v Benitez, Emilio Juan | 6-4,6-1 |
| ITF Argentina F5 | 2018/09/12 16:05 | Guido Ivan Justo v Nicolas Alvarez | 3-6,1-6 |
| ITF Argentina F4 | 2018/09/05 14:30 | Guido Ivan Justo v Santiago Rodriguez Taverna | 1-6,6-0,3-6 |
| ITF Argentina F4 | 2018/09/04 14:30 | Guido Ivan Justo v Bruna, Esteban | 6-4,6-4 |
| ITF Belgium F7 Qual | 2018/08/06 11:00 | Horton, Nicholas v Guido Ivan Justo | 6-1,6-1 |
| ITF Peru F1 | 2018/09/24 15:00 | Skierkier, Boruch v Hidalgo, Diego | 3-6,3-6 |
| Coupe Davis | 2018/09/15 15:25 | Lawrence, Xavier v Hidalgo, Diego | 0-6,1-6 |
| ITF Spain F24 | 2018/08/23 15:20 | Hidalgo, Diego v Semmler, Miguel | 3-6,6-1,3-6 |
| ITF Spain F24 | 2018/08/22 10:10 | Hidalgo, Diego v Sorni Chavarria, Quim | 6-2,6-4 |
| ITF Spain F24 | 2018/08/20 13:40 | Cuevas, Martin v Hidalgo, Diego | 3-6,4-6 |
| ITF Spain F22 | 2018/08/10 17:55 | Hidalgo, Diego v Perez Sanz, David | 5-7,4-6 |
| ITF Spain F22 | 2018/08/08 17:00 | Hidalgo, Diego v Brugnerotto, Marco | 6-1,6-3 |
| ITF Spain F22 | 2018/08/07 18:20 | Hidalgo, Diego v Chavez Villalpando, Luis Diego | 6-2,6-4 |