Stadium: Cancha Central Round: 44 Ground: Clay
| ITF Chile F1 | 2018/11/12 13:00 | Riva, Matias v Escalona Ordenes, Felipe | 3-6,3-6 |
| ITF Argentina F8 | 2018/11/03 13:00 | Tomas Farjat v Riva, Matias | 6-1,6-1 |
| ITF Peru F3 | 2018/10/07 16:00 | Tomas Farjat v Riva, Matias | 6-7,6-0,6-2 |
| ITF Peru F2 | 2018/09/29 18:00 | Riva, Matias v Laelson Rodrigues | 7-6,4-6,2-6 |
| ITF Bolivia F3 | 2018/09/25 14:00 | Riva, Matias v Markovic, Goran | 7-6,2-6,3-6 |
| ITF Bolivia F3 | 2018/09/24 15:30 | Riva, Matias v Ribas Crichigno, Lucas Carlos | 5-7,7-5,7-5 |
| ITF Bolivia F3 | 2018/09/23 14:00 | Barros, Emmanuel v Riva, Matias | 3-6,4-6 |
| ITF Bolivia F2 | 2018/09/15 16:00 | Riva, Matias v Blumenberg, Alex | 4-6,4-6 |
| ITF Chile F1 | 2018/11/13 19:55 | Aguilar, Federico Juan v Huertas Del Pino Cordova, Arklon | 1-6,1-6 |
| ITF Chile F1 | 2018/11/12 13:00 | Leiva Biason, Oscar Mattias v Aguilar, Federico Juan | 1-6,3-6 |
| ITF Argentina F8 | 2018/11/03 17:00 | Conner Huertas Del Pino v Aguilar, Federico Juan | 6-0,6-0 |
| ITF Argentina F7 | 2018/10/28 13:00 | Rocco, Jeremias v Aguilar, Federico Juan | 6-1,6-2 |
| ITF Argentina F7 | 2018/10/27 13:00 | Pastore, Cristian Luciano v Aguilar, Federico Juan | 2-6,2-6 |
| ITF Peru F3 | 2018/10/06 16:30 | Aguilar, Federico Juan v Vallebuona, Duilio | 4-6,2-6 |
| ITF Peru F2 | 2018/09/30 15:30 | Aguilar, Federico Juan v Gimenez, J. | 3-6,2-6 |
| ITF Peru F1 | 2018/09/24 15:00 | Santos, Nicolas v Aguilar, Federico Juan | 6-2,7-5 |