Stadium: Court 5 Round: 54 Ground: Clay
| ITF M15 Sao Paulo | 2019/10/14 14:00 | Marcio Eduardo Silva v Joao Giannella | 6-1,6-2 |
| ITF M25 Rio de Janeiro | 2019/10/08 15:35 | Andre Miele v Joao Giannella | 6-1,6-1 |
| ITF M25 Rio de Janeiro | 2019/10/07 14:00 | Joao Giannella v Luis Britto | 6-1,6-2 |
| ITF M15 Curitiba | 2019/06/25 14:35 | Oscar Gabriel Ortiz v Joao Giannella | 6-3,6-0 |
| ITF M15 Curitiba | 2019/06/24 18:45 | Felipe Muzzi v Joao Giannella | 3-6,6-7 |
| ITF M15 Sao JDR Preto | 2019/06/18 12:30 | Gabriel Ciro Da Silva v Joao Giannella | 6-1,6-0 |
| ITF M15 Sao JDR Preto | 2019/06/17 13:30 | Victor Bertoldo v Joao Giannella | 2-6,1-6 |
| ITF Brazil F9 | 2018/11/13 12:00 | Joao Giannella v Gustavo Heide | 2-6,2-6 |