Stadium: Court 1 Round: 25 Ground: Clay
| 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 |
| ITF M15 Monastir | 2021/08/22 11:00 | Syed Mohd Agil Syed Naguib v Nicolas Zanellato | 6-4,2-6,4-10 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Bozo Barun v Nicolas Zanellato | 6-3,6-1 |
| ITF M25 Rio do Sul | 2021/10/18 17:35 | Caio Gruber v Gustavo Tedesco | 6-3,6-3 |
| ITF M15 Recife | 2021/09/23 22:00 | Jose Pereira v Caio Gruber | 6-1,6-1 |
| ITF M15 Recife | 2021/09/22 13:00 | Caio Gruber v Andre Miele | 6-4,6-4 |
| ITF M25 Medellin | 2021/09/15 18:15 | Nicolas Buitrago v Caio Gruber | 6-3,6-4 |
| ITF M25 Medellin | 2021/09/13 20:00 | Marcelo Marino Hidalgo v Caio Gruber | 5-7,2-6 |
| ITF M15 Ibague | 2021/09/07 14:00 | Gustavo Tedesco v Caio Gruber | 4-6,6-4,10-5 |
| ITF M15 Ibague | 2021/09/06 18:30 | Marin Dumitru v Caio Gruber | 4-6,1-6 |
| ITF M15 Maldonado | 2019/11/25 14:30 | Rodrigo Arus v Caio Gruber | 6-4,6-3 |