Stadium: Court 2 Round: 54 Ground: Clay
| ITF M15 Sao Paulo | 2019/10/14 14:00 | Andre Miele v Gabriel P Tumasonis | 6-0,6-2 |
| ITF Brazil F9 | 2018/11/13 13:20 | Rafael Matos v Gabriel P Tumasonis | 7-6,6-1 |
| ITF Brazil F9 | 2018/11/12 13:35 | Gabriel P Tumasonis v Lucas Bernardo | 6-4,6-1 |
| ITF Brazil F8 | 2018/11/04 15:30 | Gabriel P Tumasonis v Joao Hinsching | 4-6,2-6 |
| ITF Brazil F8 | 2018/11/03 16:30 | Gabriel P Tumasonis v Hugo Moura | 6-2,6-4 |
| ITF Brazil F7 | 2018/10/27 14:30 | Pedro Gabriel Rodrigues v Gabriel P Tumasonis | 6-1,6-0 |
| ITF Brazil F6 | 2018/10/20 15:30 | Gabriel P Tumasonis v Karl W W Mac-Leay | 3-6,3-6 |
| ITF Brazil F5 | 2018/10/15 14:00 | Joao Hinsching v Gabriel P Tumasonis | 6-0,6-2 |