Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Brasilia | 2021/11/02 16:55 | Obeid, Lucas v Victor Tosetto | 4-6,2-6 |
| ITF M25 Rio do Sul | 2021/10/18 18:20 | Obeid, Lucas v Thomas Kano | 6-4,5-7,6-10 |
| ITF M15 Recife | 2021/09/23 18:05 | Daniel Dutra Da Silva v Obeid, Lucas | 6-2,6-0 |
| ITF M15 Cancun | 2020/01/29 17:00 | Obeid, Lucas v Mark Whitehouse | 1-6,1-6 |
| ITF M15 Cancun | 2019/12/11 14:00 | Obeid, Lucas v Juan Carlos Aguilar | 2-6,3-6 |
| ITF M15 Cancun | 2019/12/01 19:00 | Panta, Gianfranco v Obeid, Lucas | 6-0,6-2 |
| ITF M15 Cancun | 2019/10/13 13:30 | Obeid, Lucas v Acob, Zandrix | 1-6,2-6 |
| ITF M15 Cancun | 2019/08/28 17:30 | Obeid, Lucas v Jesse Flores | 1-6,3-6 |
| ITF M15 Brasilia | 2021/11/02 12:00 | Gabriel P Tumasonis v Lacalle, Eduardo | 6-3,4-6,11-9 |
| ITF M15 Brasilia | 2021/11/01 12:00 | Sean Hess v Gabriel P Tumasonis | 1-6,6-4,8-10 |
| ITF M25 Rio do Sul | 2021/10/18 20:10 | Pedro Cressoni v Gabriel P Tumasonis | 7-5,6-4 |
| ITF M15 Recife | 2021/09/22 17:00 | Gabriel P Tumasonis v Gobernate, Asdrubal | 2-6,3-6 |
| ITF M15 Recife | 2021/09/20 13:00 | Segantini Bertoldo, Victor v Gabriel P Tumasonis | 3-6,3-6 |
| Sao Paulo, Singles M-ITF-BRA-06A | 2019/10/14 14:00 | Miele, Andre v Gabriel P Tumasonis | 6-0,6-2 |
| ITF Brazil F9 | 2018/11/13 13:20 | Matos, Rafael v Gabriel P Tumasonis | 7-6,6-1 |
| ITF Brazil F9 | 2018/11/12 13:35 | Gabriel P Tumasonis v Bernardo, Lucas | 6-4,6-1 |