Stadium: Court 2 Round: 54 Ground: Clay
| ITF Chile F3 | 2018/11/26 15:30 | Echazu, Mauricio v Daniel Antonio Nunez | 7-5,6-3 |
| ITF M15 Lima | 2019/07/09 14:00 | Leiva Biason, Oscar Mattias v Agustin Maria Gascia | 4-6,3-6 |
| Curitiba, Singles M-ITF-BRA-04A | 2019/06/24 18:30 | Leiva Biason, Oscar Mattias v Azevedo Pereira E Oliveira, Bernardo | 4-6,6-4,4-10 |
| 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 |