Stadium: Court 3 Round: 54 Ground: Clay
| ITF - M15 Buenos Aires | 2019/09/16 18:30 | Nicolas Bruna v Santiago Besada | 6-4,6-0 |
| ITF - M15 Buenos Aires | 2019/09/15 17:00 | Francisco Erramuspe v Santiago Besada | 2-6,1-6 |
| ITF - M15 Lambare | 2019/08/20 14:00 | Santiago Besada v Gaston Tonello | 4-6,3-6 |
| ITF - M15 Lambare | 2019/08/19 14:00 | Santiago Besada v Hugo Moura | 6-3,6-1 |
| ITF - M25 Toulouse | 2019/06/17 11:20 | Alexander Donski v Santiago Besada | 6-2,6-2 |
| ITF - M15 Buenos Aires | 2019/05/01 13:20 | Thiago Agustin Tirante v Santiago Besada | 6-3,3-6,6-1 |
| ITF - M15 Buenos Aires | 2019/04/30 12:00 | Santiago Besada v Felipe Derdoy | 4-6,6-0,10-7 |
| ITF - M15 Buenos Aires | 2019/04/29 12:00 | Santiago Besada v Franco Roncadelli | 6-1,6-2 |
| ITF - M15 Buenos Aires | 2019/09/15 17:00 | Mariano Navone v Oscar Matias Leiva Biason | 6-1,6-1 |
| ITF - M25 Lima | 2019/07/15 15:00 | Daniel Antonio Nunez v Oscar Matias Leiva Biason | 6-4,6-3 |
| ITF - M15 Lima | 2019/07/09 14:00 | Oscar Matias Leiva Biason v Agustin Maria Gascia | 4-6,3-6 |
| ITF M15 Curitiba | 2019/06/24 18:30 | Oscar Matias Leiva Biason v Bernardo A P E Oliveira | 4-6,6-4,4-10 |
| ITF M15 Sao JDR Preto | 2019/06/17 16:00 | Oscar Matias Leiva Biason v Agustin Riquelme Coppari | 3-6,5-7 |
| ITF M15 Bucaramanga | 2019/04/22 20:30 | Oscar Matias Leiva Biason v Joao M Nusdeo | 2-6,6-7 |
| ITF M15 Guayaquil | 2019/04/15 15:00 | Oscar Matias Leiva Biason v Joao M Nusdeo | 4-6,2-6 |
| ITF Chile F3 | 2018/11/24 15:00 | Oscar Gabriel Ortiz v Oscar Matias Leiva Biason | 6-2,6-4 |