Stadium: Quadra 8 Round: 14 Ground: Clay
| ITF M25 Maceio | 2024/03/17 19:00 | Victor Braga v Gustavo Giudici | 3-6,6-2,10-4 |
| ITF M25 Feira De Santana | 2024/03/10 13:00 | Luiz Felipe Gobbi Brandao v Gustavo Giudici | 7-6,4-6,10-3 |
| ITF M25 Recife | 2024/03/03 13:00 | Victor Hugo Remondy Pagotto v Gustavo Giudici | 2-6,6-4,10-2 |
| ITF M25 Lajeado | 2023/10/09 18:00 | Gustavo Giudici v Julian Cundom | 2-6,1-6 |
| ITF M15 Sao Paulo | 2023/08/21 14:00 | Gustavo Giudici v Lautaro Agustin Corthey | 3-6,2-6 |
| ITF M15 Belem | 2023/08/16 20:25 | Gustavo Giudici v Enzo Lima | 1-6,2-6 |
| ITF M15 Belem | 2023/08/15 13:00 | Gustavo Giudici v Nicolas Hollender | 6-7,7-5,12-10 |
| ITF M15 Belem | 2023/08/14 13:00 | Elbert Barr v Gustavo Giudici | 6-1,4-6,0-10 |
| Challenger Santiago | 2024/03/11 13:00 | Mariano Kestelboim v Guido Ivan Justo | 6-2,4-6,6-1 |
| Challenger Santiago | 2024/03/10 15:25 | Nicolas Bruna v Guido Ivan Justo | 0-6,1-6 |
| Challenger Santa Cruz | 2024/03/05 17:00 | Juan Manuel Cerundolo v Guido Ivan Justo | 6-3,6-2 |
| Challenger Santa Cruz | 2024/03/04 16:45 | Ignacio Buse v Guido Ivan Justo | 1-6,3-6 |
| Challenger Santa Cruz | 2024/03/03 16:45 | Tobias Franco v Guido Ivan Justo | 1-6,1-6 |
| ITF M15 Villa Maria | 2024/02/21 16:25 | Luciano Emanuel Ambrogi v Guido Ivan Justo | 7-6,6-2 |
| ITF M25 Punta del Este | 2024/02/09 15:50 | Guido Ivan Justo v Gonzalo Bueno | 7-6,3-6,5-7 |
| ITF M25 Punta del Este | 2024/02/08 13:00 | Eduardo Ribeiro v Guido Ivan Justo | 6-7,2-6 |