Stadium: Court 15 Round: 62 Ground: Clay
| ITF Bolivia F3 | 2018/09/25 14:00 | Matias Riva v Markovic, Goran | 7-6,2-6,3-6 |
| ITF Bolivia F3 | 2018/09/24 15:30 | Matias Riva v Ribas Crichigno, Lucas Carlos | 5-7,7-5,7-5 |
| ITF Bolivia F3 | 2018/09/23 14:00 | Barros, Emmanuel v Matias Riva | 3-6,4-6 |
| ITF Bolivia F2 | 2018/09/15 16:00 | Matias Riva v Blumenberg, Alex | 4-6,4-6 |
| ITF Argentina F4 | 2018/09/01 12:00 | Ambrosio, Benjamin L 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 Ortiz, Oscar Gabriel | 1-6,3-6 |
| ITF Argentina F1 | 2018/05/13 14:30 | Postay, Alan v Matias Riva | 6-3,6-0 |
| ITF Peru F1 | 2018/09/22 16:30 | Laelson Rodrigues v Skierkier, Boruch | 2-6,0-6 |
| ITF Brazil F1 | 2018/04/21 16:00 | Laelson Rodrigues v Blumenberg, Alex | 2-6,2-6 |
| ITF Portugal F8 Qual | 2018/04/14 13:30 | Dowson, Dan v Laelson Rodrigues | 6-4,6-2 |
| ITF Portugal F7 Qual | 2018/04/07 15:30 | Teixeira, Duarte Nuno v Laelson Rodrigues | 7-6,6-2 |
| ITF Portugal F6 Qual | 2018/03/24 10:00 | Henderson, Russell v Laelson Rodrigues | 6-4,4-6,6-2 |
| ITF Portugal F5 Qual | 2018/03/18 17:00 | Fermosell, Jaime v Laelson Rodrigues | 6-4,6-0 |
| ITF Portugal F5 Qual | 2018/03/18 11:30 | Maia, Hugo v Laelson Rodrigues | 6-4,4-6,4-6 |
| Portugal F4, Singles Qualifying | 2018/03/11 11:30 | Severino, Carlos Eduardo v Laelson Rodrigues | 6-1,6-0 |