Stadium: Cancha 1 Round: 27 Ground: Clay
| ITF Argentina F8 | 2016/05/25 22:00 | Gonzalo Villanueva v Saez, Juan Carlos | 6-2,1-6,6-4 |
| ITF Peru F1 | 2014/10/22 15:00 | Gonzalo Villanueva v Saez, Juan Carlos | 6-7,4-6 |
| ITF Argentina F3 | 2018/05/29 18:45 | Gonzalo Villanueva v Martinez Sarrasague, Felipe | 6-2,6-1 |
| ITF Argentina F2 | 2018/05/25 16:10 | Gonzalo Villanueva v Camilo Ugo Carabelli | 6-2,1-6,2-6 |
| ITF Argentina F2 | 2018/05/24 16:40 | Arguello, Facundo v Gonzalo Villanueva | 6-7,5-7 |
| ITF Argentina F2 | 2018/05/23 16:45 | Hidalgo, Gabriel Alejandro v Gonzalo Villanueva | 1-6,0-6 |
| ITF Argentina F2 | 2018/05/22 18:20 | Tomas Martin Etcheverry v Gonzalo Villanueva | 4-6,4-6 |
| ITF Brazil F4 | 2018/05/16 22:10 | Gonzalo Villanueva v Thiago Seyboth Wild | 3-6,5-7 |
| ITF Brazil F4 | 2018/05/14 17:15 | Gonzalo Villanueva v Alejandro Tabilo | 7-6,6-3 |
| ITF Brazil F3 | 2018/05/08 13:00 | Gonzalo Villanueva v Matos, Rafael | 2-6,6-3,3-6 |
| ITF Argentina F3 | 2018/05/30 13:00 | Nunez, V. v Saez, Juan Carlos | 4-6,6-3,3-6 |
| ITF Argentina F3 | 2018/05/29 17:00 | Gagliardo, Lorenzo v Saez, Juan Carlos | 7-6,4-6,4-6 |
| ITF Argentina F2 | 2018/05/26 13:30 | Camilo Ugo Carabelli v Saez, Juan Carlos | 7-6,6-3 |
| ITF Argentina F2 | 2018/05/25 13:00 | Saez, Juan Carlos v Oscar Jose Gutierrez | 6-4,4-6,6-4 |
| ITF Argentina F2 | 2018/05/24 14:00 | Zukas, Matias v Saez, Juan Carlos | 6-7,2-6 |
| ITF Argentina F2 | 2018/05/23 13:00 | Grassi Mazzuchi, Juan Pablo v Saez, Juan Carlos | 4-6,2-6 |
| ITF Argentina F2 | 2018/05/22 13:00 | Makiguchi, Ryusei v Saez, Juan Carlos | 1-6,2-6 |
| ITF Argentina F1 | 2018/05/16 15:00 | Tomas Farjat v Saez, Juan Carlos | 6-4,6-4 |