Stadium: Central Round: 26 Ground: Clay
| Challenger Buenos Aires | 2018/11/13 19:30 | Carlos Berlocq v Mario Vilella Martinez | 5-7,6-7 |
| Challenger Montevideo | 2018/11/11 15:00 | Mario Vilella Martinez v Carlos Berlocq | 1-6,4-6 |
| Challenger Montevideo | 2018/11/09 23:00 | Mario Vilella Martinez v Martin Cuevas | 6-3,6-4 |
| Challenger Montevideo | 2018/11/08 19:50 | Mario Vilella Martinez v Dimitar Kuzmanov | 6-2,7-6 |
| Challenger Montevideo | 2018/11/06 23:40 | Pablo Cuevas v Mario Vilella Martinez | 2-6,2-6 |
| Challenger Santo Domingo | 2018/10/08 17:30 | Mario Vilella Martinez v Rogerio Dutra Silva | 1-6,3-6 |
| Challenger Monterrey | 2018/10/02 19:20 | Sebastian Ofner v Mario Vilella Martinez | 6-1,6-2 |
| Challenger Szczecin | 2018/09/13 11:00 | Mario Vilella Martinez v Guido Andreozzi | 4-6,3-6 |
| Challenger Buenos Aires | 2018/11/13 14:30 | Juan Pablo Ficovich v Pedja Krstin | 6-3,3-6,6-7 |
| Challenger Montevideo | 2018/11/07 23:00 | Pedja Krstin v Guido Pella | 6-1,3-6,5-7 |
| Challenger Montevideo | 2018/11/06 15:00 | Federico Gaio v Pedja Krstin | 6-7,5-7 |
| Challenger Guayaquil | 2018/11/01 20:30 | Pedja Krstin v Guido Andreozzi | 4-6,2-6 |
| Challenger Guayaquil | 2018/10/31 18:00 | Paolo Lorenzi v Pedja Krstin | 6-7,2-6 |
| Challenger Guayaquil | 2018/10/29 19:45 | Pedja Krstin v Roberto Cid Subervi | 6-3,7-6 |
| Challenger Lima | 2018/10/24 01:05 | Pedja Krstin v Federico Delbonis | 2-6,2-6 |
| Challenger Santo Domingo | 2018/10/13 01:15 | Pedja Krstin v Federico Delbonis | 0-6,3-6 |