| ITF M25 Maceio | 03/21 01:25 | 25 | 데 카르발호 카르도소 알베스, 마테우스 v Tumasonis, Gabriel Pascotto | 6-1,6-2 | |
| ITF M25 Maceio | 03/18 15:00 | 54 | Facundo Bermejo v Tumasonis, Gabriel Pascotto | 5-7,2-6 | |
| ITF M25 Feira De Santana | 03/10 13:00 | 54 | Joaquim Almeida v Tumasonis, Gabriel Pascotto | Retired | |
| ITF M25 Recife | 03/06 14:40 | 25 | Tumasonis, Gabriel Pascotto v 폴리오트, 퀸틴 | 4-6,6-4,4-6 | |
| ITF M25 Recife | 03/04 15:15 | 54 | Facundo Bermejo v Tumasonis, Gabriel Pascotto | 0-6,6-7 | |
| ITF M25 Recife | 03/03 16:00 | 54 | Guilherme Meale v Tumasonis, Gabriel Pascotto | 0-6,2-6 | |
| Challenger Piracicaba | 01/28 18:45 | 14 | 웬저, 다민 v Tumasonis, Gabriel Pascotto | 6-1,6-1 | |
| ITF M25 Lajeado | 10/09 16:00 | 54 | Hess, Sean v Tumasonis, Gabriel Pascotto | 6-3,6-2 | |
| Sao Paulo, Singles M-ITF-BRA-06A | 08/21 16:30 | 54 | Enzo Lima v Tumasonis, Gabriel Pascotto | 6-3,6-1 | |
| ITF M15 Belem | 08/15 13:00 | 54 | Tumasonis, Gabriel Pascotto v 카브레라, 미구엘 안젤 | 0-6,1-6 | |
| ITF M15 Belem | 08/14 13:00 | 54 | Tumasonis, Gabriel Pascotto v Valentin M Greco | 6-3,6-3 | |
| ITF M25 Mosquera | 03/20 18:40 | 54 | 놀드쿠이스트, 아르비드 v Tumasonis, Gabriel Pascotto | 6-3,6-4 | |
| ITF M25 Anapoima | 03/12 15:00 | 54 | Lucero, Joel Angel v Tumasonis, Gabriel Pascotto | 6-1,6-2 | |
| ITF M25 Santo Domingo | 02/20 14:00 | 62 | Ziwen Ju v Tumasonis, Gabriel Pascotto | 7-6,6-3 | |
| ITF M25 Santo Domingo Qual | 02/19 13:00 | 62 | Liam Oliver v Tumasonis, Gabriel Pascotto | 6-3,4-6,6-10 | |
| ITF M25 Santo Domingo | 02/14 13:00 | 62 | Tumasonis, Gabriel Pascotto v Thomas Brown | 3-6,1-6 | |
| ITF M25 Santo Domingo | 02/13 17:00 | 62 | Tumasonis, Gabriel Pascotto v Kenzo K Larsson | 7-5,6-4 | |
| ITF M25 Vacaria | 11/30 16:05 | 25 | Tumasonis, Gabriel Pascotto v Gabriel Schenekenberg | 4-6,6-7 | |
| ITF M25 Lajeado | 11/22 23:10 | 25 | Rodriguez, Lorenzo Joaquin v Tumasonis, Gabriel Pascotto | 6-3,6-3 | |
| Sao Leopoldo, Brazil | 11/13 14:15 | 14 | Tumasonis, Gabriel Pascotto v 리베이로, 에듀알도 | 3-6,5-7 | |
| ITF M25 Rio de Janeiro | 10/19 17:30 | 25 | Rodrigues, Pedro v Tumasonis, Gabriel Pascotto | 6-4,6-2 | |
| Challenger Campinas | 10/02 14:30 | 14 | 산체즈 조벨, 카를로스 v Tumasonis, Gabriel Pascotto | 6-1,6-1 | |
| ITF M15 Cancun | 10/01 15:00 | 26 | 안드라드, 안드레스 v Tumasonis, Gabriel Pascotto | Cancelled | |
| ITF M15 Cancun | 09/28 14:00 | 25 | Tumasonis, Gabriel Pascotto v Rogers, Andrew | 3-6,4-6 | |
| ITF M15 Cancun | 09/20 15:00 | 25 | Tumasonis, Gabriel Pascotto v 누스데오, 조아오 마르코스 | 6-3,1-6,4-6 | |
| ITF M15 Cancun | 09/20 15:00 | 25 | Tumasonis, Gabriel Pascotto v Jaden Weekes | Cancelled | |
| ITF M15 Cancun | 09/13 20:10 | 25 | Tumasonis, Gabriel Pascotto v 므비디, 뭰드와 | 6-7,2-6 | |
| ITF M15 Cancun | 09/08 14:00 | 26 | Lilov, Victor v Tumasonis, Gabriel Pascotto | 6-4,6-3 | |
| ITF M15 Cancun | 09/07 15:40 | 25 | Tumasonis, Gabriel Pascotto v 오구라, 코스케 | 6-2,6-3 | |
| ITF M15 Brasilia | 08/25 13:00 | 26 | 야마시타, 페르난도 v Tumasonis, Gabriel Pascotto | 6-2,7-6 |