Stadium: Court 3 Round: 27 Ground: Clay
| ITF M25 Rio do Sul | 2021/10/21 16:30 | Igor Marcondes v Gustavo Heide | 6-7,1-6 |
| ITF M25 Rio do Sul | 2021/10/19 13:30 | Bruno Fernandez v Gustavo Heide | 1-6,2-6 |
| ITF M15 Recife | 2021/09/26 13:30 | Gustavo Heide v Jose Pereira | 6-4,6-2 |
| ITF M15 Recife | 2021/09/25 14:00 | Eduardo Ribeiro v Gustavo Heide | 5-7,4-6 |
| ITF M15 Recife | 2021/09/24 16:55 | Daniel Dutra Da Silva v Gustavo Heide | 4-6,4-6 |
| ITF M15 Recife | 2021/09/23 13:30 | Joao M Nusdeo v Gustavo Heide | 1-6,0-6 |
| ITF M15 Recife | 2021/09/21 17:10 | Natan Rodrigues v Gustavo Heide | 1-6,3-6 |
| ITF M25 Medellin | 2021/09/15 16:35 | Pedro Boscardin Dias v Gustavo Heide | 6-3,3-6,6-3 |
| ITF M25 Rio do Sul | 2021/10/21 16:10 | Nicolas Zanellato v Oscar Jose Gutierrez | 6-7,6-1,6-1 |
| ITF M25 Rio do Sul | 2021/10/20 16:30 | Nicolas Zanellato v Caio Gruber | 6-2,6-1 |
| ITF M15 Recife | 2021/09/24 15:25 | Eduardo Ribeiro v Nicolas Zanellato | 6-4,6-7,6-3 |
| ITF M15 Recife | 2021/09/23 13:30 | Nicolas Zanellato v Joao Eduardo Schiessl | 7-5,6-0 |
| ITF M15 Recife | 2021/09/22 17:40 | Daniel V C Rebelo v Nicolas Zanellato | 0-6,1-6 |
| ITF M15 Monastir | 2021/09/05 09:30 | Timur Kiyamov v Nicolas Zanellato | 6-0,6-2 |
| ITF M15 Monastir | 2021/08/29 09:30 | Nicolas Zanellato v Alec Beckley | 4-6,2-6 |
| ITF M15 Monastir | 2021/08/23 08:00 | Nicolas Zanellato v Robin Bertrand | 3-6,5-7 |