Stadium: Court 14 Round: 25 Ground: Clay
| ITF M15 Brasilia | 2021/11/02 21:55 | Ribeiro Marcondes, Igor v Eduardo Ribeiro | 5-7,4-6 |
| ITF M25 Rio do Sul | 2021/10/21 16:30 | Ribeiro Marcondes, Igor v Gustavo Heide | 6-7,1-6 |
| ITF M25 Rio do Sul | 2021/10/19 14:30 | Ribeiro Marcondes, Igor v Joao Pedro G. Dos Santos | 6-4,6-0 |
| ITF M25 Johannesburg | 2021/09/23 07:00 | Ribeiro Marcondes, Igor v Seelig, Kyle | 6-1,6-7,1-6 |
| ITF M25 Johannesburg | 2021/09/21 10:30 | Ribeiro Marcondes, Igor v Sibanda, Mehluli Don Ayanda | 6-1,7-5 |
| ITF M25 Johannesburg | 2021/09/14 08:00 | Ribeiro Marcondes, Igor v Kelsey Stevenson | 5-7,6-7 |
| ITF M25 Sintra | 2021/09/08 14:35 | Dan Added v Ribeiro Marcondes, Igor | 6-2,6-4 |
| ITF M25 Poznan | 2021/08/27 11:30 | Pawel Juszczak v Ribeiro Marcondes, Igor | 6-2,5-7,6-4 |
| ITF M25 Aparecida De Goiania | 2021/11/08 16:00 | Gabriel Roveri Sidney v Stefani Figlia, B. | 6-4,6-2 |
| ITF M25 Aparecida De Goiania | 2021/11/07 18:30 | Gabriel Roveri Sidney v Igor Gimenez | 6-3,3-6,10-7 |
| ITF M15 Brasilia | 2021/11/03 15:05 | Valerio Aboian v Gabriel Roveri Sidney | 6-3,6-2 |
| ITF M15 Brasilia | 2021/11/02 13:20 | Gabriel Roveri Sidney v Giannella, Joao | 6-3,6-2 |
| ITF M25 Rio do Sul | 2021/10/20 17:05 | Pedro Boscardin Dias v Gabriel Roveri Sidney | 6-4,6-2 |
| ITF M15 Cancun | 2021/10/03 19:45 | Reinberg, Emil v Gabriel Roveri Sidney | 7-6,7-5 |
| ITF M15 Cancun | 2021/09/28 14:00 | Gabriel Roveri Sidney v Colin Markes | 1-6,4-6 |
| ITF M15 Cancun | 2021/09/27 14:30 | Adam Jones v Gabriel Roveri Sidney | 2-6,2-6 |