Stadium: Court 4 Round: 62 Ground: Clay
| ITF - M15 - Antalya | 2021/10/11 09:00 | Lukas H Lilleengen v Gonzalo Zeitune | 6-4,6-0 |
| ITF - M25 Aparecida De Goiania | 2021/11/09 13:10 | Mateo Barreiros Reyes v Paulo A S Dos Santos | 6-7,4-6 |
| ITF - M25 Aparecida De Goiania | 2021/11/08 16:00 | Gabriel Batagin v Mateo Barreiros Reyes | 3-6,2-6 |
| ITF - M25 Aparecida De Goiania | 2021/11/07 17:00 | Gustavo Teisen Pereira v Mateo Barreiros Reyes | 4-6,2-6 |
| ITF - M15 Brazília | 2021/11/04 14:25 | Mateo Barreiros Reyes v Conner Huertas Del Pino | 2-6,4-6 |
| ITF - M15 Brazília | 2021/11/03 18:00 | Mateo Barreiros Reyes v Nicolas Zanellato | 7-6,2-6,6-4 |
| ITF - M25 Rio do Sul | 2021/10/20 14:45 | Gilbert S K Junior v Mateo Barreiros Reyes | 3-6,6-1,6-2 |
| ITF - M15 Recife | 2021/09/21 22:40 | Pedro Boscardin Dias v Mateo Barreiros Reyes | 6-2,6-2 |
| ITF - M25 Medellín | 2021/09/15 18:45 | Jose Pereira v Mateo Barreiros Reyes | 6-2,6-4 |