Stadium: Court 2 Round: 25 Ground: Clay
| ITF Argentina F6 | 2018/09/18 18:25 | Juan Ignacio Galarza v Nicolas Alberto Arreche | 6-3,6-3 |
| ITF Chile F2 | 2018/11/22 17:00 | Tomas Martin Etcheverry v Nicolas Alberto Arreche | 4-6,6-4,6-4 |
| ITF Chile F2 | 2018/11/21 17:35 | Michel Vernier v Nicolas Alberto Arreche | 4-6,6-3,4-6 |
| ITF Chile F2 | 2018/11/19 16:30 | Nicolas Alberto Arreche v Mateo Nicolas Martinez | 7-5,3-6,6-4 |
| Challenger Buenos Aires | 2018/11/11 14:00 | Tomas Lipovsek Puches v Nicolas Alberto Arreche | 6-2,7-6 |
| ITF Argentina F8 | 2018/11/08 14:00 | Facundo Mena v Nicolas Alberto Arreche | 6-4,6-2 |
| ITF Argentina F8 | 2018/11/07 13:00 | Nicolas Uryson v Nicolas Alberto Arreche | 3-6,2-6 |
| ITF Argentina F8 | 2018/11/06 13:00 | Conner Huertas Del Pino v Nicolas Alberto Arreche | 2-6,1-6 |
| ITF Argentina F7 | 2018/10/29 17:00 | Guido Ivan Justo v Nicolas Alberto Arreche | 0-6,6-4,6-0 |
| ITF Chile F2 | 2018/11/20 22:45 | Juan Ignacio Galarza v Bastian Malla | 6-3,4-6,4-6 |
| Challenger Buenos Aires | 2018/11/12 16:30 | Bastian Malla v Juan Ignacio Galarza | 6-4,2-6,6-2 |
| Challenger Buenos Aires | 2018/11/12 00:50 | Juan Ignacio Galarza v Camilo Ugo Carabelli | 7-5,6-1 |
| Challenger Buenos Aires | 2018/11/11 17:50 | Matias Zukas v Juan Ignacio Galarza | 6-7,7-5,4-6 |
| Challenger Montevideo | 2018/11/06 16:40 | Juan Ignacio Galarza v Guido Andreozzi | 6-1,5-7,3-6 |
| Challenger Montevideo | 2018/11/05 17:45 | Juan Ignacio Galarza v Ulises Blanch | 6-3,2-6,6-4 |
| Challenger Montevideo | 2018/11/04 17:50 | Juan Ignacio Galarza v Bastian Malla | 2-6,7-6,6-1 |
| Challenger Montevideo | 2018/11/03 18:05 | Miljan Zekic v Juan Ignacio Galarza | 5-7,7-5,4-6 |