Round: 62 Ground: Clay
| ITF Bolivia F1 | 2015/09/05 13:00 | Gabriel P Tumasonis v Alejandro Dorado | 6-1,6-0 |
| ITF Brazil F4 | 2015/08/18 15:30 | Alexandre G R Girotto v Gabriel P Tumasonis | 7-5,2-6,7-5 |
| ITF Brazil F3 | 2015/06/21 12:00 | Federico Nicolas Bertucci v Gabriel P Tumasonis | 6-2,6-2 |
| ITF Brazil F1 | 2015/06/06 18:10 | Gabriel P Tumasonis v Agustin Suarez Gonzalez | 7-6,6-2 |
| ITF Colombia F3 | 2015/05/26 15:00 | Daniel Elahi Galan v Gabriel P Tumasonis | 6-3,6-7,6-4 |
| ITF Colombia F2 | 2015/05/19 19:45 | Gabriel P Tumasonis v Carlos Salamanca | 3-6,4-6 |
| ITF Colombia F2 | 2015/05/18 15:00 | Gabriel P Tumasonis v Juan Sebastian Osorio | 6-2,7-6 |
| ITF Colombia F2 | 2015/05/17 17:00 | Gabriel P Tumasonis v Geronimo Barrios | 6-3,6-2 |
| ITF Bolivia F3 Qual | 2014/09/28 14:00 | Marco Antonio Rojas v Agustin Moyano | 2-6,3-6 |