Stadium: Cancha 1 Round: 19 Ground: Clay
| ITF M15 Olavarria | 2023/09/08 14:05 | Mariano Kestelboim v Guido Ivan Justo | 6-3,3-6,1-6 |
| Challenger Concepcion | 2021/02/14 16:00 | Guido Ivan Justo v Mariano Kestelboim | 3-6,6-4,3-6 |
| ITF M15 Villa Maria | 2024/02/26 13:20 | Mariano Kestelboim v Facundo Mena | 6-3,6-0 |
| ITF M15 Villa Maria | 2024/02/24 16:10 | Alex M Pujolras v Mariano Kestelboim | 2-6,1-6 |
| ITF M15 Villa Maria | 2024/02/23 13:55 | Luciano Emanuel Ambrogi v Mariano Kestelboim | 4-6,4-6 |
| ITF M15 Villa Maria | 2024/02/22 14:00 | Franco Roncadelli v Mariano Kestelboim | 2-6,2-6 |
| ITF M15 Villa Maria | 2024/02/20 15:00 | Mariano Kestelboim v Nicolas Zanellato | 6-2,6-4 |
| Challenger Piracicaba | 2024/01/29 17:00 | Gonzalo Villanueva v Mariano Kestelboim | 6-2,7-5 |
| Challenger Piracicaba | 2024/01/29 13:00 | Enrique Bogo v Mariano Kestelboim | 2-6,0-6 |
| UTR Pro Tigre | 2023/12/10 19:49 | Leonardo Aboian v Mariano Kestelboim | 2-6,2-6 |
| 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 |
| ITF M25 Punta del Este | 2024/02/06 16:30 | Ignacio Monzon v Guido Ivan Justo | 4-6,6-4,2-6 |
| 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 |