Stadium: Quadra 3 Round: 14 Ground: Clay
| Challenger Rio de Janeiro | 2021/12/12 18:00 | Gabriel P Tumasonis v Rafael Matos | 3-6,5-7 |
| ITF M15 Brasilia | 2021/11/04 13:00 | Eduardo Ribeiro v Gabriel P Tumasonis | 6-2,6-1 |
| ITF M15 Brasilia | 2021/11/03 12:00 | Lucas Obeid v Gabriel P Tumasonis | 2-6,1-6 |
| ITF M15 Brasilia | 2021/11/02 12:00 | Gabriel P Tumasonis v Eduardo Lacalle | 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 Asdrubal Gobernate | 2-6,3-6 |
| ITF M15 Recife | 2021/09/20 13:00 | Victor Bertoldo v Gabriel P Tumasonis | 3-6,3-6 |
| Challenger Buenos Aires | 2022/01/04 18:25 | Gonzalo Villanueva v Alec Deckers | 7-6,6-4 |
| Challenger Buenos Aires | 2022/01/03 14:50 | Ignacio Carou v Alec Deckers | 3-6,6-2,6-7 |
| Challenger Buenos Aires | 2022/01/02 13:00 | Lorenzo Gagliardo v Alec Deckers | 6-7,6-4,4-6 |
| ITF M15 Heráklion | 2021/11/30 08:30 | Sandro Kopp v Alec Deckers | 6-4,3-6,6-4 |
| ITF M15 Heráklion | 2021/11/23 07:00 | Alec Deckers v Alexandros Skorilas | 6-4,6-7,8-10 |
| ITF M15 Heráklion | 2021/11/22 08:00 | Alec Deckers v Dennis Dragomirov | 6-2,6-2 |
| ITF M15 Heráklion | 2021/11/21 11:00 | Alec Deckers v James Markiewicz | 6-4,6-4 |
| ITF M15 Heráklion | 2021/11/17 07:00 | Alec Deckers v Lukas Krainer | 5-7,6-7 |