Stadium: Court 8 Round: 27 Ground: Clay
| ITF Uruguay F2 | 2016/12/07 16:35 | Gonzalo Villanueva v Nicolas Santos | 6-4,2-6,6-1 |
| ITF Brazil F2 | 2018/05/02 15:00 | Carlos E. Severino v Nicolas Santos | 7-6,6-3 |
| ITF Brazil F1 | 2018/04/26 01:30 | Nicolas Santos v Christian Lindell | 6-7,4-6 |
| ITF Brazil F1 | 2018/04/25 23:00 | Nicolas Santos v Christian Lindell | 6-7,4-5 |
| ITF Brazil F1 | 2018/04/23 23:35 | Nicolas Santos v Mateus Alves | 6-3,6-4 |
| ITF Turkey F9 | 2018/03/05 07:00 | Nicolas Santos v Gabi Adrian Boitan | 3-6,3-6 |
| ITF Turkey F9 | 2018/03/04 07:00 | Nicolas Santos v Teodor Giusca | 1-6,6-4,7-5 |
| ITF Turkey F8 | 2018/02/27 11:35 | Emil Ruusuvuori v Nicolas Santos | 6-4,6-4 |
| ITF Turkey F7 | 2018/02/21 10:00 | Nicolas Santos v Joao Pedro Sorgi | 3-6,0-6 |
| ITF Brazil F2 | 2018/05/01 18:40 | Gonzalo Villanueva v Tomas Martin Etcheverry | 5-7,6-3,7-6 |
| ITF Brazil F1 | 2018/04/25 15:30 | Daniel Dutra Da Silva v Gonzalo Villanueva | 7-5,7-6 |
| ITF Brazil F1 | 2018/04/23 14:00 | Christian Oliveira v Gonzalo Villanueva | 7-5,3-6,0-6 |
| Challenger Santiago Qual | 2018/03/03 13:00 | Jose Hernandez-Fernandez v Gonzalo Villanueva | 7-6,7-6 |
| Challenger Punta Del Este Qual | 2018/02/26 14:30 | Juan Ignacio Galarza v Gonzalo Villanueva | 6-3,6-2 |
| Challenger Punta Del Este Qual | 2018/02/25 16:20 | Franco Agamenone v Gonzalo Villanueva | 1-6,3-6 |
| Challenger Punta Del Este Qual | 2018/02/24 19:40 | Gonzalo Villanueva v Gonzalo Lama | 7-5,3-6,6-2 |
| ITF Argentina F12 | 2017/12/06 14:15 | Gonzalo Villanueva v Daniel Dutra Da Silva | 1-6,6-7 |