Stadium: Quadra P.A. Round: 54 Ground: Clay
| Sao Jose Do Rio Preto, Singles M-ITF-BRA-03A | 2019/06/17 16:00 | Leiva Biason, Oscar Mattias v Riquelme Coppari, Agustin | 3-6,5-7 |
| Bucaramanga, Singles M-ITF-COL-01A | 2019/04/22 20:30 | Leiva Biason, Oscar Mattias v Nusdeo, Joao Marcos | 2-6,6-7 |
| ITF M15 Guayaquil | 2019/04/15 15:00 | Leiva Biason, Oscar Mattias v Nusdeo, Joao Marcos | 4-6,2-6 |
| ITF Chile F3 | 2018/11/24 15:00 | Ortiz, Oscar Gabriel v Leiva Biason, Oscar Mattias | 6-2,6-4 |
| ITF Chile F2 | 2018/11/17 16:00 | Leiva Biason, Oscar Mattias v Berne, Mateo | 6-3,3-6,3-6 |
| ITF Chile F1 | 2018/11/12 13:00 | Leiva Biason, Oscar Mattias v Aguilar, Federico Juan | 1-6,3-6 |
| ITF Belgium F7 Qual | 2018/08/05 08:00 | Mertens, Nico v Leiva Biason, Oscar Mattias | 6-1,6-0 |
| ITF Belgium F7 Qual | 2018/08/04 07:30 | Leiva Biason, Oscar Mattias v Velasquez Meza, Javier Alonso | 6-0,6-0 |
| ITF Dominican Republic F3 | 2018/12/09 14:00 | Feitt, Franco v Azevedo Pereira E Oliveira, Bernardo | 6-3,6-3 |
| ITF Dominican Republic F2 | 2018/12/02 15:00 | Gessner, Lucas v Azevedo Pereira E Oliveira, Bernardo | 2-6,6-2,7-5 |
| ITF Dominican Republic F2 | 2018/12/01 15:30 | Azevedo Pereira E Oliveira, Bernardo v Segantini Bertoldo, Victor | 6-2,6-4 |
| ITF Dominican Republic F1 | 2018/11/25 15:00 | Richmond, John Harrison v Azevedo Pereira E Oliveira, Bernardo | 5-7,6-7 |
| ITF Dominican Republic F1 | 2018/11/24 16:00 | Santamaria, Felipe v Azevedo Pereira E Oliveira, Bernardo | 4-6,2-6 |
| ITF Brazil F9 | 2018/11/12 15:10 | Azevedo Pereira E Oliveira, Bernardo v Zarichanskiy, D. | 6-7,0-6 |
| ITF Brazil F8 | 2018/11/04 15:30 | Costa, Fabio v Azevedo Pereira E Oliveira, Bernardo | 6-3,6-1 |
| ITF Brazil F8 | 2018/11/03 16:30 | Azevedo Pereira E Oliveira, Bernardo v Tiepermann Pereira, Eber Faria | 6-1,6-0 |