Stadium: Court 19 Round: 54 Ground: Clay
| ITF M15 Recife | 2021/09/22 15:30 | Gustavo Teisen Pereira v Enrique Bogo | 3-6,1-6 |
| ITF M25 Rio de Janeiro | 2019/10/07 14:00 | Carlos E. Severino v Gustavo Teisen Pereira | 6-1,6-1 |
| ITF Brazil F9 | 2018/11/11 14:00 | Gustavo Teisen Pereira v Leonardo Reami Da Cunha | 7-6,1-6,1-6 |
| ITF Brazil F7 | 2018/10/27 12:00 | Natan Rodrigues v Gustavo Teisen Pereira | 6-2,6-0 |
| ITF USA F25 | 2018/09/14 16:00 | Gustavo Teisen Pereira v Rishabh Sharda | 0-6,6-4,4-6 |
| ATP Sao Paulo Qual | 2017/02/25 16:40 | Nicolas Kicker v Gustavo Teisen Pereira | 6-0,6-0 |
| ITF M15 Brasilia | 2021/11/04 14:25 | Mateo Barreiros Reyes v Conner Huertas Del Pino | 2-6,4-6 |
| ITF M15 Brasilia | 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 Medellin | 2021/09/15 18:45 | Jose Pereira v Mateo Barreiros Reyes | 6-2,6-4 |
| ITF M25 Medellin | 2021/09/13 20:00 | Mateo Barreiros Reyes v Sebastian Santibanez | 6-3,6-3 |
| ITF M15 Ibague | 2021/09/08 17:00 | Juan A H Serrano v Mateo Barreiros Reyes | 7-6,6-4 |
| ITF M15 Ibague | 2021/09/07 14:00 | Mateo Barreiros Reyes v William Yovanny Ribero Duarte | 6-0,6-4 |