Stadium: Cancha 12 Round: 25 Ground: Clay
| ITF Bolivia F3 | 2018/09/24 15:30 | Matias Riva v Lucas C R Crichigno | 5-7,7-5,7-5 |
| ITF Bolivia F3 | 2018/09/23 14:00 | Manuel Barros v Matias Riva | 3-6,4-6 |
| ITF Bolivia F2 | 2018/09/15 16:00 | Matias Riva v Alex Blumenberg | 4-6,4-6 |
| ITF Argentina F4 | 2018/09/01 12:00 | Benjamin L Ambrosio v Matias Riva | 6-1,6-1 |
| ITF Argentina F3 | 2018/05/26 12:00 | Lautaro Agustin Falabella v Matias Riva | 6-1,6-3 |
| ITF Argentina F2 | 2018/05/19 12:00 | Matias Riva v Oscar Gabriel Ortiz | 1-6,3-6 |
| 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 Bolivia F2 | 2018/09/18 19:00 | Goran Markovic v Luciano Doria | 6-7,6-3,4-6 |
| ITF Bolivia F1 | 2018/09/12 21:30 | Goran Markovic v Raul Garcia | 5-7,3-6 |
| ITF Bolivia F1 | 2018/09/11 21:30 | Goran Markovic v Nicolas Doria Medina | 6-3,6-3 |
| ITF Serbia F5 | 2018/09/06 12:10 | Pavle Daljev v Goran Markovic | 6-3,6-3 |
| ITF Serbia F5 | 2018/09/04 10:15 | Alexey Aleshchev v Goran Markovic | 4-6,3-6 |
| ITF Serbia F3 | 2018/08/22 09:15 | Martin Bugaj v Goran Markovic | 6-3,7-5 |
| ITF Serbia F1 | 2018/08/07 08:00 | Goran Markovic v Simone Roncalli | 1-6,3-6 |
| ITF Slovakia F2 | 2018/08/01 10:20 | Goran Markovic v Alexander Shevchenko | 1-6,2-6 |