Round: 62 Ground: Clay
| ITF Bolivia F2 | 2018/09/16 14:00 | Conner Huertas Del Pino v Marcos Castares | 6-0,6-0 |
| ITF Bolivia F1 | 2018/09/10 20:30 | Lucas C R Crichigno v Marcos Castares | 6-3,6-2 |
| ITF Bolivia F1 | 2018/09/09 16:30 | Marcos Castares v Alejandro H Franco | 7-5,6-3 |
| ITF Bolivia F1 | 2018/09/08 16:30 | Marcos Castares v Andres Urrea | 7-6,6-1 |
| ITF Argentina F4 | 2018/09/01 17:30 | Marcos Castares v Luciano Carraro | 2-6,5-7 |
| ITF Argentina F2 | 2018/05/19 14:30 | Marcos Castares v Agustin Riquelme Coppari | 3-6,2-6 |
| ITF Argentina F1 | 2018/05/12 14:00 | Julian Cundom v Marcos Castares | 6-1,7-5 |
| ITF Argentina F12 | 2017/12/05 12:00 | Augusto Laranja v Marcos Castares | 6-3,6-4 |
| ITF Bolivia F2 | 2018/09/18 21:00 | Alex Blumenberg v Agustin Ozcoidi | 6-3,6-4 |
| ITF Bolivia F2 | 2018/09/16 16:30 | Luis Diego Chavez Villalpando v Agustin Ozcoidi | 4-6,6-7 |
| ITF Bolivia F2 | 2018/09/15 13:30 | Cleiner Caceres v Agustin Ozcoidi | 0-6,5-7 |
| ITF Bolivia F1 | 2018/09/09 14:00 | Daniel Alejandro Ortiz v Agustin Ozcoidi | 6-2,6-2 |
| ITF Argentina F8 | 2017/11/04 17:00 | Agustin Ozcoidi v Alejo Michaux | 5-7,6-3,5-7 |
| ITF Bolivia F3 Qual | 2017/09/30 16:00 | Cristopher Kohl v Agustin Ozcoidi | 6-2,6-0 |
| ITF Bolivia F2 Qual | 2017/09/23 16:00 | Agustin Ozcoidi v David Fleming | 1-6,0-6 |
| ITF Bolivia F1 | 2017/09/18 15:50 | Victor Nunez v Agustin Ozcoidi | 1-6,6-1,6-3 |