Stadium: Quadra 3 Round: 28 Ground: Clay
| Challenger Campinas MD | 2021/11/19 20:45 | Casanova/Rodriguez Taverna v Coria/Lipovsek Puches | 4-6,6-3,10-7 |
| Challenger Campinas MD | 2021/11/17 19:00 | Andreozzi/Etcheverry v Casanova/Rodriguez Taverna | 4-6,3-6 |
| Challenger Montevideo MD | 2021/11/11 22:10 | Matos/M R Alves v Casanova/Rodriguez Taverna | 6-4,6-1 |
| Challenger Montevideo MD | 2021/11/10 21:40 | Acosta/Arus v Casanova/Rodriguez Taverna | 3-6,6-1,4-10 |
| Challenger Buenos Aires MD | 2021/10/23 20:00 | Darderi/Torres v Casanova/Rodriguez Taverna | 7-6,7-6 |
| Challenger Buenos Aires MD | 2021/10/22 16:40 | Casanova/Rodriguez Taverna v Kicker/Ugo Carabelli | 6-3,6-2 |
| Challenger Buenos Aires MD | 2021/10/21 20:30 | Casanova/Rodriguez Taverna v Duran/Tirante | 6-1,6-7,10-8 |
| Challenger Buenos Aires MD | 2021/10/19 20:00 | Casanova/Rodriguez Taverna v Collarini/Kestelboim | 6-2,7-6 |
| Challenger Campinas MD | 2021/11/18 17:40 | Cid Subervi/Sakamoto v Klier Junior/P De Almeida | 2-6,4-6 |
| Challenger Campinas MD | 2021/11/17 21:30 | Klier Junior/P De Almeida v Luz/Martinez | 6-3,3-6,10-4 |
| Challenger Montevideo MD | 2021/11/11 01:05 | Cerundolo/Cuevas v Klier Junior/P De Almeida | 6-3,6-2 |
| ITF M25 Kiseljak MD | 2021/05/29 13:30 | Reis da Silva/Sels v Klier Junior/P De Almeida | 4-6,6-4,10-4 |
| ITF M25 Kiseljak MD | 2021/05/28 17:00 | Basic/Fatic v Klier Junior/P De Almeida | 7-5,3-6,8-10 |
| ITF M25 Kiseljak MD | 2021/05/27 13:40 | Onclin/Riedi v Klier Junior/P De Almeida | 2-6,7-6,13-15 |
| ITF M25 Kiseljak MD | 2021/05/25 15:35 | Makk/Palovic v Klier Junior/P De Almeida | 0-6,1-6 |