| ITF M15 Cancun | 10/11 17:00 | 44 | Luis Britto v Oscar Matias Leiva Biason | 6-1,6-3 | |
| ITF M15 Cancun | 10/03 19:45 | 44 | Oscar Matias Leiva Biason v Leonardo Civita-Telles | 3-6,2-6 | |
| ITF M15 Cancun | 09/26 17:30 | 44 | Oscar Matias Leiva Biason v Gabriel Roveri Sidney | 1-6,2-6 | |
| ITF M15 Cancun | 09/19 14:00 | 44 | Nikolas Moceanu v Oscar Matias Leiva Biason | 6-1,6-3 | |
| ITF M25 Medellin | 09/12 15:00 | 44 | Nicolas Buitrago v Oscar Matias Leiva Biason | 6-0,6-1 | |
| ITF M15 Ibague | 09/05 15:00 | 44 | Felipe Escobar v Oscar Matias Leiva Biason | 6-2,6-1 | |
| ITF M25 Lima | 02/09 15:00 | 44 | Oscar Matias Leiva Biason v Bautista Vilicich | 2-6,7-6,2-10 | |
| ITF M25 Lima | 02/03 15:00 | 44 | Miljan Zekic v Oscar Matias Leiva Biason | 6-2,6-0 | |
| ITF M25 Lima | 02/02 18:00 | 44 | Oscar Matias Leiva Biason v Agustin Riquelme Coppari | 6-2,2-6,10-6 | |
| ITF M15 Cancun | 12/08 14:00 | 44 | Oscar Matias Leiva Biason v Javier Gonzalez | 4-6,1-6 | |
| ITF M15 Cancun | 12/01 19:00 | 44 | Oscar Matias Leiva Biason v Jordan Benjamin | 3-6,1-6 | |
| ITF M15 Santiago | 09/30 14:00 | 54 | Santiago Besada v Oscar Matias Leiva Biason | 6-4,6-4 | |
| ITF M15 Buenos Aires | 09/15 17:00 | 44 | Mariano Navone v Oscar Matias Leiva Biason | 6-1,6-1 | |
| ITF M25 Lima | 07/15 15:00 | 54 | Daniel Antonio Nunez v Oscar Matias Leiva Biason | 6-4,6-3 | |
| ITF M15 Lima | 07/09 14:00 | 54 | Oscar Matias Leiva Biason v Agustin Maria Gascia | 4-6,3-6 | |
| ITF M15 Curitiba | 06/24 18:30 | 54 | Oscar Matias Leiva Biason v Bernardo A P E Oliveira | 4-6,6-4,4-10 | |
| ITF M15 Sao JDR Preto | 06/17 16:00 | 54 | Oscar Matias Leiva Biason v Agustin Riquelme Coppari | 3-6,5-7 | |
| ITF M15 Bucaramanga | 04/22 20:30 | 45 | Oscar Matias Leiva Biason v Joao M Nusdeo | 2-6,6-7 | |
| ITF M15 Guayaquil | 04/15 15:00 | 45 | Oscar Matias Leiva Biason v Joao M Nusdeo | 4-6,2-6 | |
| ITF Chile F3 | 11/24 15:00 | 44 | Oscar Gabriel Ortiz v Oscar Matias Leiva Biason | 6-2,6-4 | |
| ITF Chile F2 | 11/17 16:00 | 44 | Oscar Matias Leiva Biason v Mateo Berne | 6-3,3-6,3-6 | |
| ITF Chile F1 | 11/12 13:00 | 44 | Oscar Matias Leiva Biason v Federico Juan Aguilar | 1-6,3-6 | |
| ITF Belgium F7 Qual | 08/05 08:00 | 62 | Nico Mertens v Oscar Matias Leiva Biason | 6-1,6-0 | |
| ITF Belgium F7 Qual | 08/04 07:30 | 62 | Oscar Matias Leiva Biason v Javier A V. Meza | 6-0,6-0 | |
| ITF Belgium F6 Qual | 07/28 09:30 | 44 | Amaury Delmas v Oscar Matias Leiva Biason | 6-0,6-3 | |
| ITF Germany F9 | 07/22 08:00 | 62 | Oscar Matias Leiva Biason v Moritz Dettinger | 2-6,1-6 | |
| ITF Belgium F4 | 07/14 07:00 | 44 | Javier Naser v Oscar Matias Leiva Biason | 6-2,6-0 | |
| ITF Germany F7 | 07/09 08:00 | 44 | Andres Urrea v Oscar Matias Leiva Biason | 7-6,6-2 | |
| ITF Belgium F2 Qual | 06/24 14:50 | 44 | Oscar Matias Leiva Biason v Paul Valsecchi | 2-6,1-6 | |
| ITF Belgium F2 Qual | 06/23 13:20 | 44 | Oscar Matias Leiva Biason v Yannis Zekri | 6-1,6-0 |