Stadium: Cancha 4 Round: 26 Ground: Clay
| ITF M25 Lima MD | 2021/10/05 21:20 | Arias/Zeballos v Roncadelli/Valsecchi | 6-0,6-2 |
| ITF M25 Medellin MD | 2021/09/18 18:40 | Klier Junior/Reis da Silva v Dias/Heide | 6-4,4-6,10-8 |
| ITF M25 Medellin MD | 2021/09/17 20:00 | Klier Junior/Reis da Silva v El Mihdawy/Sakamoto | 7-6,6-4 |
| ITF M25 Medellin MD | 2021/09/16 20:00 | Klier Junior/Reis da Silva v Reyes/Bogo | 6-4,6-4 |
| ITF M25 Medellin MD | 2021/09/15 20:10 | Klier Junior/Reis da Silva v Castro/Lacalle | 6-0,6-4 |
| ITF M15 Castelo Branco MD | 2021/07/29 16:15 | Coelho/Rodrigues v Klier Junior/Reis da Silva | 6-2,6-3 |
| ITF M15 Castelo Branco MD | 2021/07/27 15:15 | Araujo/Ho v Klier Junior/Reis da Silva | 1-6,4-6 |
| ITF M25 Idanha-A-Nova MD | 2021/07/24 10:50 | Klier Junior/Reis da Silva v Carr/Cozbinov | 3-6,6-2,5-10 |
| ITF M25 Idanha-A-Nova MD | 2021/07/23 12:30 | Fancutt/Hoyt v Klier Junior/Reis da Silva | 6-7,6-4,8-10 |