Stadium: Indoor 1 Round: 25 Ground: Clay
| Challenger Lima | 2023/08/22 18:45 | Guido Ivan Justo v Pedro Sakamoto | 4-6,6-7 |
| ITF M15 Pinamar | 2019/03/28 12:30 | Pedro Sakamoto v Guido Ivan Justo | 4-6,6-7 |
| ITF M15 Santa Cruz | 2023/11/30 23:10 | Juan Carlos Prado Angelo v Guido Ivan Justo | 7-6,6-0 |
| ITF M15 Santa Cruz | 2023/11/28 21:50 | Joao Victor C Loureiro v Guido Ivan Justo | 1-6,3-6 |
| ITF M15 Rosario | 2023/11/07 15:00 | Matias Franco Descotte v Guido Ivan Justo | 6-3,6-3 |
| ITF M15 Monastir | 2023/10/28 08:30 | Guido Ivan Justo v Olaf Pieczkowski | 6-1,6-7,3-6 |
| ITF M15 Monastir | 2023/10/26 12:30 | Jaka Protic Zakelj v Guido Ivan Justo | 1-6,0-6 |
| ITF M15 Monastir | 2023/10/25 12:30 | Noel Larwig v Guido Ivan Justo | 6-7,2-6 |
| ITF M15 Castellon | 2023/10/21 08:40 | Guido Ivan Justo v Miguel Damas | 6-3,6-2 |
| ITF M15 Castellon | 2023/10/20 10:00 | Guido Ivan Justo v Georgii Kravchenko | 7-5,6-4 |
| Challenger Piracicaba | 2024/01/30 14:20 | Gerard Campana Lee v Pedro Sakamoto | 7-5,6-1 |
| Challenger Punta del Este | 2024/01/22 19:40 | Felix Gill v Pedro Sakamoto | 6-4,6-2 |
| Challenger Punta del Este | 2024/01/21 21:00 | Ignacio Carou v Pedro Sakamoto | 3-6,1-6 |
| Challenger Buenos Aires Qual | 2024/01/15 16:55 | Pedro Sakamoto v Felix Gill | 3-6,3-6 |
| Challenger Buenos Aires Qual | 2024/01/14 18:00 | Pedro Sakamoto v Leo Borg | 6-3,6-4 |
| Challenger Buenos Aires | 2024/01/11 13:00 | Pedro Sakamoto v Joao Lucas Reis da Silva | 5-7,0-6 |
| Challenger Buenos Aires | 2024/01/09 15:10 | Pedro Sakamoto v Carlos Taberner | 6-4,7-6 |
| Challenger Temuco | 2023/12/01 14:00 | Gilbert S K Junior v Pedro Sakamoto | 6-0,6-3 |