Round: 62 Ground: Clay
| ITF Argentina F1 | 2017/06/04 12:30 | Guido Ivan Justo v Gaston E Cantero | 6-3,6-4 |
| ITF Argentina F1 | 2018/05/13 14:30 | Gaston E Cantero v Felipe Derdoy | 6-3,4-6,6-4 |
| ITF Argentina F12 | 2017/12/03 12:00 | Ignacio Carou v Gaston E Cantero | 7-5,2-6,7-6 |
| ITF Argentina F12 | 2017/12/02 12:00 | Gaston Tonello v Gaston E Cantero | 6-3,2-6,5-7 |
| ITF Argentina F11 | 2017/11/26 13:00 | Facundo Diaz Acosta v Gaston E Cantero | 6-2,6-1 |
| ITF Argentina F11 | 2017/11/25 14:30 | Gaston E Cantero v Tomas Farjat | 6-1,6-3 |
| ITF Argentina F11 | 2017/11/25 12:00 | Gaston E Cantero v Manuel Barros | 3-6,6-3,6-2 |
| ITF Argentina F10 | 2017/11/20 12:00 | Gaston E Cantero v Lucas Farfan | 2-6,4-6 |
| ITF Argentina F9 | 2017/11/13 16:45 | Gonzalo Villanueva v Gaston E Cantero | 6-4,6-1 |
| ITF Argentina F1 | 2018/05/12 17:30 | Lautaro Agustin Falabella v Guido Ivan Justo | 3-6,4-6 |
| ITF Argentina F12 | 2017/12/05 17:00 | Alejo Vilaro v Guido Ivan Justo | 6-2,6-1 |
| ITF Argentina F12 | 2017/12/04 12:00 | Leonardo Aboian v Guido Ivan Justo | 2-6,4-6 |
| ITF Argentina F12 | 2017/12/03 12:00 | Guido Ivan Justo v Jeff Guerrero | 6-1,6-0 |
| ITF Argentina F12 | 2017/12/02 12:00 | Guido Ivan Justo v Tiago Seweryniak | 4-6,7-5,6-2 |
| ITF Argentina F11 | 2017/11/28 19:55 | Juan Ignacio Galarza v Guido Ivan Justo | 6-4,6-4 |
| ITF Argentina F9 | 2017/11/12 13:00 | Guido Ivan Justo v Valentin Florez | 6-4,1-6,2-6 |
| ITF Argentina F8 | 2017/11/07 15:45 | Sebastian Baez v Guido Ivan Justo | 6-1,6-2 |