Stadion: Centre Court Round: 54 Ground: Clay
| 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 - M25 - Rio do Sul | 2021/10/20 17:20 | Marcelo Zormann v Enrique Bogo | 6-3,6-1 |
| ITF - M25 - Rio do Sul | 2021/10/18 18:30 | Marcelo Zormann v Augusto Giacomolli de Andrade | 6-4,6-0 |
| ITF - M15 - Recife | 2021/09/24 18:40 | Jose Pereira v Marcelo Zormann | 7-6,6-4 |
| ITF - M15 - Recife | 2021/09/23 14:50 | Marcelo Zormann v Oscar Jose Gutierrez | 6-2,4-6,7-5 |
| ITF - M15 - Recife | 2021/09/22 16:45 | Marcelo Zormann v Bruno Fernandez | 6-3,6-1 |
| UTR Pro Tennis Series - Ricany | 2021/09/08 09:00 | Dominik Kellovsky v Marcelo Zormann | 6-4,5-1 |
| ITF - M15 - Cancun | 2021/10/17 18:00 | Ronaldo Alexandre v Andres Urrea | 2-6,2-6 |
| ITF - M15 - Cancun | 2021/10/10 18:00 | Luciano Doria v Ronaldo Alexandre | 6-1,6-1 |
| ITF - M15 - Cancun | 2021/10/03 15:30 | Ronaldo Alexandre v Miles Jones | 1-6,1-6 |
| ITF - M15 - Cancun | 2021/09/26 15:00 | Ronaldo Alexandre v Luca Moro Almeida | 6-4,6-7,6-10 |
| ITF - M15 - Cancun | 2021/09/19 14:00 | Ronaldo Alexandre v Alex Jones | 2-6,6-3,2-10 |
| ITF - M15 - Cancun | 2020/03/11 14:00 | Alfredo Perez v Ronaldo Alexandre | 6-0,6-0 |
| ITF - M15 - Cancun | 2020/02/16 15:00 | Emmett Ward v Ronaldo Alexandre | 6-0,6-0 |
| ITF - M15 - Cancun | 2020/02/10 14:00 | Ronaldo Alexandre v Maik Steiner | 1-6,1-6 |