Stadium: Cancha 7 Round: 25 Ground: Clay
| ITF Argentina F8 | 2018/11/05 13:00 | Agustin Velotti v Guido Ivan Justo | 6-3,6-1 |
| ITF Argentina F7 | 2018/11/02 14:00 | Conner Huertas Del Pino v Guido Ivan Justo | 6-3,3-6,7-5 |
| ITF Argentina F7 | 2018/10/31 19:00 | Juan Manuel Cerundolo v Guido Ivan Justo | 3-6,6-1,3-6 |
| ITF Argentina F7 | 2018/10/29 17:00 | Guido Ivan Justo v Nicolas Alberto Arreche | 0-6,6-4,6-0 |
| ITF Peru F3 | 2018/10/11 15:00 | Gonzalo Villanueva v Guido Ivan Justo | 6-0,6-0 |
| ITF Peru F3 | 2018/10/09 18:00 | Lautaro Agustin Falabella v Guido Ivan Justo | 3-6,4-6 |
| ITF Peru F2 | 2018/10/04 17:00 | Guido Ivan Justo v Gonzalo Villanueva | 4-6,1-6 |
| ITF Peru F2 | 2018/10/02 19:10 | Jorge Panta v Guido Ivan Justo | 7-5,2-6,3-6 |
| ITF Argentina F8 | 2018/11/04 13:00 | Oscar Gabriel Ortiz v Santiago Besada | 2-6,1-6 |
| ITF Argentina F8 | 2018/11/03 13:00 | Aliaksandr Bulitski v Oscar Gabriel Ortiz | 6-2,1-6,3-6 |
| ITF Argentina F7 | 2018/10/30 17:00 | Oscar Gabriel Ortiz v Juan Manuel Cerundolo | 6-3,2-6,1-6 |
| ITF Argentina F7 | 2018/10/29 17:30 | Oscar Gabriel Ortiz v Ramiro Pioli Tizon | 1-6,6-4,6-1 |
| ITF Argentina F7 | 2018/10/28 15:30 | Francisco Comesana v Oscar Gabriel Ortiz | 4-6,3-6 |
| ITF Argentina F6 | 2018/09/18 13:00 | Oscar Gabriel Ortiz v Camilo Ugo Carabelli | 2-6,4-6 |
| ITF Argentina F5 | 2018/09/09 12:00 | Nicolas Ferrando v Oscar Gabriel Ortiz | 6-1,6-4 |
| ITF Argentina F4 | 2018/09/02 13:00 | Mateo Galdon v Oscar Gabriel Ortiz | 6-3,6-1 |