Stadium: Court 1 Round: 27 Ground: Clay
| ITF M15 Recife | 2021/09/23 16:30 | Eduardo Ribeiro v Asdrubal Gobernate | 6-4,6-4 |
| ITF M15 Recife | 2021/09/22 19:30 | Joao Lucas Reis da Silva v Eduardo Ribeiro | 1-6,7-5,4-6 |
| ITF M15 Antalya | 2021/05/16 07:00 | Eduardo Ribeiro v Arvid Nordquist | 1-6,0-6 |
| ITF M15 Antalya | 2021/05/11 07:00 | Edoardo Eremin v Eduardo Ribeiro | 6-4,7-5 |
| ITF M15 Antalya | 2021/05/10 07:00 | Eduardo Ribeiro v Ignacio Carou | 3-6,7-5,10-4 |
| ITF M15 Antalya | 2021/05/09 07:00 | Credit Chaiyarin v Eduardo Ribeiro | 2-6,2-6 |
| ITF M15 Cairo | 2021/05/04 08:00 | Simon A Ivanov v Eduardo Ribeiro | 4-6,6-3,10-7 |
| ITF M15 Cairo | 2021/05/03 11:00 | Mohab Hamed v Eduardo Ribeiro | 3-6,0-6 |
| 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 M15 Sarajevo | 2021/05/31 10:00 | Andrej Nedic v Nicolas Zanellato | 3-6,3-6 |