| ITF Argentina F3 | 05/26 12:00 | 62 | Gabriel P Tumasonis v Bruno Caula | 1-6,3-6 | |
| ITF Argentina F2 | 05/21 13:00 | 62 | Gabriel P Tumasonis v Juan M G Paiva | 1-6,6-7 | |
| ITF Argentina F2 | 05/20 13:00 | 62 | Alan Kohen v Gabriel P Tumasonis | 4-6,6-7 | |
| ITF Argentina F2 | 05/19 12:00 | 62 | Nicolas Zaidman v Gabriel P Tumasonis | 4-6,1-6 | |
| ITF Brazil F4 Qual | 05/14 14:40 | 62 | Igor Gimenez v Gabriel P Tumasonis | 6-4,6-1 | |
| ITF Brazil F4 Qual | 05/13 12:00 | 62 | Gabriel P Tumasonis v Francisco Llanes | 7-6,6-3 | |
| ITF Brazil F4 Qual | 05/12 12:00 | 62 | Gabriel P Tumasonis v Leonardo S Frederico | 6-1,6-0 | |
| ITF Brazil F3 | 05/06 12:30 | 44 | Gabriel P Tumasonis v Francisco Comesana | 3-6,7-5,5-7 | |
| ITF Brazil F3 | 05/05 12:30 | 44 | Pedro Gabriel Rodrigues v Gabriel P Tumasonis | 6-7,5-7 | |
| ITF Brazil F2 | 04/28 15:00 | 44 | Gabriel P Tumasonis v Eduardo Ribeiro | 6-3,5-7,3-6 | |
| ITF Brazil F1 | 04/22 13:00 | 44 | Tomas Martin Etcheverry v Gabriel P Tumasonis | 6-2,4-6,6-2 | |
| ITF Brazil F4 | 11/28 16:50 | 25 | Gabriel P Tumasonis v Nicolas Santos | 0-6,0-6 | |
| ITF Brazil F4 | 11/27 11:00 | 62 | Lucas Bernardo v Gabriel P Tumasonis | 6-7,2-6 | |
| ITF Brazil F4 | 11/26 13:00 | 62 | Leonardo Reami Da Cunha v Gabriel P Tumasonis | 3-6,1-6 | |
| ITF Brazil F3 | 11/20 14:00 | 25 | Gabriel P Tumasonis v Alexandre Tsuchiya | 1-6,4-6 | |
| ITF Brazil F2 | 11/14 17:40 | 25 | Igor Marcondes v Gabriel P Tumasonis | 6-3,6-4 | |
| ITF Brazil F2 | 11/12 13:00 | 54 | Gabriel P Tumasonis v Rafael Tosetto | 6-2,6-4 | |
| ITF Argentina F7 | 09/11 13:00 | 62 | Carlos E. Severino v Gabriel P Tumasonis | 6-4,3-6,6-2 | |
| ITF Argentina F7 | 09/09 17:30 | 62 | Fernando Sierra v Gabriel P Tumasonis | 4-6,7-5,3-6 | |
| ITF Argentina F6 | 09/02 14:30 | 54 | Gabriel P Tumasonis v Rodrigo Arus | 2-6,2-6 | |
| ITF Belgium F7 Qual | 07/30 13:55 | 62 | Gabriel P Tumasonis v Robi Tholl | 6-4,5-7,3-6 | |
| ITF Belgium F7 Qual | 07/29 11:00 | 62 | Gabriel P Tumasonis v Maxime Lapraille | 5-7,6-3,6-4 | |
| ITF Belgium F6 | 07/23 11:00 | 44 | Gabriel P Tumasonis v Javier Naser | 4-6,3-6 | |
| ITF Belgium F6 | 07/22 12:30 | 44 | Gabriel P Tumasonis v Lars Hoischen | 3-6,7-5,6-1 | |
| ITF Belgium F5 | 07/16 09:30 | 44 | Maxime Pauwels v Gabriel P Tumasonis | 6-2,6-1 | |
| ITF Belgium F5 | 07/15 11:00 | 44 | Simon Musset v Gabriel P Tumasonis | 6-7,0-6 | |
| ITF Belgium F4 Qual | 07/09 09:40 | 62 | Turpal Gadamauri v Gabriel P Tumasonis | 6-4,3-6,7-5 | |
| ITF Belgium F4 Qual | 07/08 15:00 | 62 | Crisanto Ramirez v Gabriel P Tumasonis | 1-6,3-6 | |
| ITF Belgium F3 Qual | 07/02 08:00 | 62 | Arnaud Graisse v Gabriel P Tumasonis | 6-2,6-2 | |
| ITF Romania F5 | 06/26 08:35 | 62 | Alejo Vilaro v Gabriel P Tumasonis | 2-6,6-1,6-1 |