Stadium: Court 13 Round: 54 Ground: Clay
| ITF M15 Brasilia | 2021/11/06 14:00 | Marcelo Zormann v Gustavo Heide | 2-6,4-6 |
| ITF M15 Brasilia | 2021/11/05 14:00 | Marcelo Zormann v Luis Britto | 6-1,6-2 |
| ITF M15 Brasilia | 2021/11/04 14:55 | Marcelo Zormann v Fernando Yamacita | 6-2,6-1 |
| ITF M15 Brasilia | 2021/11/03 22:35 | Joao Lucas Reis da Silva v Marcelo Zormann | 6-7,6-7 |
| ITF M15 Brasilia | 2021/11/02 11:55 | Marcelo Zormann v Bruno Stefani Figlio | 6-0,6-2 |
| ITF M15 Brasilia | 2021/11/01 12:00 | Marcelo Zormann v Ronaldo Alexandre | 6-0,6-2 |
| ITF M25 Rio do Sul | 2021/10/22 14:20 | Pedro Boscardin Dias v Marcelo Zormann | 6-3,5-7,6-3 |
| ITF M25 Rio do Sul | 2021/10/21 13:10 | Marcelo Zormann v Daniel Dutra Da Silva | 6-4,4-6,6-1 |
| ITF M15 Brasilia | 2021/11/02 15:15 | Luis Felipe Miguel v Hernando J E Isnardi | 6-4,6-0 |
| Davis Cup | 2021/09/18 13:55 | Sebastian Dominko v Hernando J E Isnardi | 6-4,3-6,7-10 |