Estadio: Court 1 Round: 29 Ground: Hardcourt outdoor
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/23 12:30 | Fancutt/Hoyt v Klier Junior/Reis da Silva | 6-7,6-4,8-10 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/22 15:55 | Klier Junior/Reis da Silva v Jones/Noskin | 7-5,7-5 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/20 15:35 | Klier Junior/Reis da Silva v Marrero/Mulye | 6-4,6-4 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/16 11:50 | Fancutt/Hoyt v Klier Junior/Reis da Silva | 7-5,6-2 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/15 15:00 | Klier Junior/Reis da Silva v Cabral/Vale | 3-6,7-6,12-10 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/13 16:00 | Klier Junior/Reis da Silva v Atlangeriev/Matusevich | 6-4,7-5 |
| ITF M15 Sarajevo - Dobles Masculinos | 2021/06/05 13:20 | Biljesko/Nincevic v Klier Junior/Reis da Silva | 6-2,3-6,10-4 |
| ITF M15 Sarajevo - Dobles Masculinos | 2021/06/04 13:10 | Madarasz/Velcz v Klier Junior/Reis da Silva | 4-6,4-6 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/23 12:30 | Falcao/Tajima v Carr/Cozbinov | 7-5,0-6,8-10 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/22 15:35 | Giacomini/Thirouin v Carr/Cozbinov | 3-6,6-3,9-11 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/20 16:55 | Cabral/Faria v Carr/Cozbinov | 6-7,4-6 |
| ITF M25 Idanha-A-Nova - Dobles Masculinos | 2021/07/14 15:10 | Shimabukuro/Tajima v Carr/Cozbinov | 6-4,6-4 |