Stadium: Court 3 Round: 25 Ground: Clay
| ITF Hungary F5 | 2018/06/19 08:00 | Rafael Matos v Jelle Sels | 2-6,3-6 |
| ITF Brazil F4 | 2018/05/18 15:00 | Rafael Matos v Joao Lucas Reis da Silva | 3-6,4-6 |
| ITF Brazil F4 | 2018/05/17 15:00 | Rafael Matos v Gabriel Ciro Da Silva | 6-2,6-1 |
| ITF Brazil F4 | 2018/05/15 14:10 | Rafael Matos v Enrique Bogo | 6-0,6-1 |
| ITF Brazil F3 | 2018/05/11 15:30 | Tomas Martin Etcheverry v Rafael Matos | 7-6,7-5 |
| ITF Brazil F3 | 2018/05/10 15:30 | Alexandre Tsuchiya v Rafael Matos | 4-6,6-1,1-6 |
| ITF Brazil F3 | 2018/05/08 13:00 | Gonzalo Villanueva v Rafael Matos | 2-6,6-3,3-6 |
| ITF Brazil F2 | 2018/05/06 15:00 | Gonzalo Villanueva v Rafael Matos | 1-6,3-6 |
| ITF Argentina F3 | 2018/05/26 12:00 | Gabriel P Tumasonis v Bruno Caula | 1-6,3-6 |
| ITF Argentina F2 | 2018/05/21 13:00 | Gabriel P Tumasonis v Juan M G Paiva | 1-6,6-7 |
| ITF Argentina F2 | 2018/05/20 13:00 | Alan Kohen v Gabriel P Tumasonis | 4-6,6-7 |
| ITF Argentina F2 | 2018/05/19 12:00 | Nicolas Zaidman v Gabriel P Tumasonis | 4-6,1-6 |
| ITF Brazil F4 Qual | 2018/05/14 14:40 | Igor Gimenez v Gabriel P Tumasonis | 6-4,6-1 |
| ITF Brazil F4 Qual | 2018/05/13 12:00 | Gabriel P Tumasonis v Francisco Llanes | 7-6,6-3 |
| ITF Brazil F4 Qual | 2018/05/12 12:00 | Gabriel P Tumasonis v Leonardo S Frederico | 6-1,6-0 |
| ITF Brazil F3 | 2018/05/06 12:30 | Gabriel P Tumasonis v Francisco Comesana | 3-6,7-5,5-7 |