Stadium: Court 1 Round: 27 Ground: Clay
| 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 F5 | 2018/09/12 14:40 | Gonzalo Villanueva v Juan Manuel Cerundolo | 6-2,6-0 |
| ITF Argentina F5 | 2018/09/10 15:35 | Gonzalo Villanueva v Arklon H D Pino | 5-7,6-2,6-2 |
| ITF Argentina F4 | 2018/09/06 18:10 | Juan Ignacio Galarza v Gonzalo Villanueva | 6-3,7-5 |
| ITF Argentina F4 | 2018/09/05 16:50 | Maximiliano Estevez v Gonzalo Villanueva | 6-0,5-7,1-6 |
| Challenger Cordenons | 2018/08/12 16:15 | Daniel Dutra Da Silva v Gonzalo Villanueva | 7-5,6-4 |
| Challenger Cordenons | 2018/08/11 12:30 | Gonzalo Villanueva v Franco Agamenone | 7-6,6-2 |
| ITF Italy F22 | 2018/08/09 12:25 | Gonzalo Villanueva v Fabien Reboul | 4-6,2-6 |
| ITF Italy F22 | 2018/08/08 11:40 | Hernan Casanova v Gonzalo Villanueva | 3-6,4-6 |
| ITF Argentina F5 | 2018/09/12 14:50 | Luciano Tacchi v Rafael Matos | 5-7,7-5,3-6 |
| ITF Argentina F5 | 2018/09/10 16:05 | Daniil Zarichanskiy v Rafael Matos | 1-6,0-6 |
| ITF Argentina F4 | 2018/09/06 17:50 | Rafael Matos v Santiago Rodriguez Taverna | 7-5,0-6,0-6 |
| ITF Argentina F4 | 2018/09/05 14:30 | Rafael Matos v Lorenzo Gagliardo | 6-1,6-1 |
| ITF Argentina F4 | 2018/09/03 14:45 | Rafael Matos v Alejo Vilaro | 6-2,6-1 |
| ITF Spain F20 | 2018/07/24 14:00 | Rafael Matos v Mikhail Korovin | 6-7,4-6 |
| ITF Spain F19 | 2018/07/18 14:00 | Carlos Lopez Montagud v Rafael Matos | 4-6,6-4,7-6 |
| ITF Spain F19 | 2018/07/16 14:00 | Abhinav Sanjeev Shanmugam v Rafael Matos | 1-6,1-6 |