Round: 62 Ground: Hardcourt outdoor
| ITF Brazil F3 | 2018/05/06 12:30 | Gabriel P Tumasonis v Francisco Comesana | 3-6,7-5,5-7 |
| ITF Brazil F3 | 2018/05/05 12:30 | Pedro Gabriel Rodrigues v Gabriel P Tumasonis | 6-7,5-7 |
| ITF Brazil F2 | 2018/04/28 15:00 | Gabriel P Tumasonis v Eduardo Ribeiro | 6-3,5-7,3-6 |
| ITF Brazil F1 | 2018/04/22 13:00 | Tomas Martin Etcheverry v Gabriel P Tumasonis | 6-2,4-6,6-2 |
| ITF Brazil F4 | 2017/11/28 16:50 | Gabriel P Tumasonis v Nicolas Santos | 0-6,0-6 |
| ITF Brazil F4 | 2017/11/27 11:00 | Lucas Bernardo v Gabriel P Tumasonis | 6-7,2-6 |
| ITF Brazil F4 | 2017/11/26 13:00 | Leonardo Reami Da Cunha v Gabriel P Tumasonis | 3-6,1-6 |
| ITF Brazil F3 | 2017/11/20 14:00 | Gabriel P Tumasonis v Alexandre Tsuchiya | 1-6,4-6 |
| ITF Brazil F4 | 2017/11/25 13:00 | Ighor Halmenschlager Reis v Leonardo S Frederico | 6-1,6-1 |