Round: 62 Ground: Clay
| ITF Argentina F3 | 2017/06/17 12:00 | Oscar Gabriel Ortiz v Matias Riva | 6-2,6-1 |
| ITF Argentina F1 | 2018/05/13 14:30 | Alan Postay v Matias Riva | 6-3,6-0 |
| ITF Argentina F12 | 2017/12/03 12:00 | Leonardo Aboian v Matias Riva | 6-4,6-4 |
| ITF Argentina F11 | 2017/11/26 13:00 | Gaston Tonello v Matias Riva | 6-2,6-1 |
| ITF Argentina F9 | 2017/11/11 14:00 | Matias Riva v Juan M G Paiva | 0-6,6-2,6-7 |
| ITF Argentina F8 | 2017/11/05 14:30 | Matias Riva v Valentin Florez | 1-6,0-6 |
| ITF Bolivia F3 Qual | 2017/09/30 16:00 | Carlos Ramirez Utermann v Matias Riva | 6-4,5-7,7-5 |
| ITF Bolivia F2 Qual | 2017/09/23 13:30 | Facundo Juarez v Matias Riva | 6-2,6-2 |
| ITF Argentina F7 | 2017/09/09 15:00 | Matias Riva v Federico Moreno | 3-6,2-6 |
| ITF Argentina F1 | 2018/05/12 14:00 | Oscar Gabriel Ortiz v Nicolas Zaidman | 6-7,2-6 |
| ITF Argentina F9 | 2017/11/14 17:05 | Juan Ignacio Galarza v Oscar Gabriel Ortiz | 6-1,6-0 |
| ITF Argentina F8 | 2017/11/06 13:00 | Mateo Nicolas Martinez v Oscar Gabriel Ortiz | 6-2,6-3 |
| ITF Argentina F8 | 2017/11/05 17:00 | Oscar Gabriel Ortiz v Juan Bautista Otegui | 6-2,6-3 |
| ITF Argentina F8 | 2017/11/04 19:00 | Juan Pablo Cenoz v Oscar Gabriel Ortiz | 3-6,4-6 |
| ITF Argentina F7 | 2017/09/11 13:30 | Gabriel Alejandro Hidalgo v Oscar Gabriel Ortiz | 7-5,6-2 |
| ITF Argentina F5 | 2017/08/26 15:00 | Facundo Diaz Acosta v Oscar Gabriel Ortiz | 6-4,6-3 |
| ITF Argentina F3 | 2017/06/20 13:00 | Geronimo E Busleiman v Oscar Gabriel Ortiz | 6-2,6-3 |