Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Sarajevo MD | 2021/06/05 13:20 | Biljesko/Nincevic v Klier Junior/Reis da Silva | 6-2,3-6,10-4 |
| ITF M15 Sarajevo MD | 2021/06/04 13:10 | Madarasz/Velcz v Klier Junior/Reis da Silva | 4-6,4-6 |
| ITF M15 Brcko MD | 2021/05/23 11:40 | Klier Junior/Reis da Silva v Vanshelboim/Virtanen | 6-2,0-6,11-9 |
| ITF M15 Brcko MD | 2021/05/22 10:40 | Klier Junior/Reis da Silva v Biljesko/Heger | 6-7,7-5,10-3 |
| ITF M15 Brcko MD | 2021/05/21 16:25 | Klier Junior/Reis da Silva v Connor/Jovic | 6-2,6-1 |
| ITF M15 Cancun MD | 2020/02/14 18:00 | L Lavallen/Marcondes v Klier Junior/Reis da Silva | 7-5,7-6 |
| ITF M15 Cancun MD | 2020/02/13 21:45 | Klier Junior/Reis da Silva v Ribeiro/Yamacita | 6-4,6-3 |
| ITF M15 Cancun MD | 2020/02/07 18:00 | Klier Junior/Reis da Silva v Blancaneaux/Petit | 1-6,2-6 |