Round: 62 Ground: Clay
| ITF Argentina F2 | 2018/05/21 15:30 | Gaston E Cantero v Tiago Seweryniak | 6-3,6-1 |
| ITF Argentina F2 | 2018/05/20 13:00 | Tiago Seweryniak v Mariano Navone | 7-5,6-4 |
| ITF Argentina F1 | 2018/05/13 12:00 | Julian Cundom v Tiago Seweryniak | 6-3,0-6,7-6 |
| ITF Argentina F12 | 2017/12/02 12:00 | Guido Ivan Justo v Tiago Seweryniak | 4-6,7-5,6-2 |
| ITF Argentina F11 | 2017/11/25 19:00 | Tiago Seweryniak v Francisco Bahamonde | 0-6,2-6 |
| ITF Argentina F10 | 2017/11/21 16:55 | Lorenzo Gagliardo v Tiago Seweryniak | 6-4,2-6,6-2 |
| ITF Argentina F9 | 2017/11/12 13:00 | Gabriel Alejandro Hidalgo v Tiago Seweryniak | 6-1,6-2 |
| ITF Argentina F9 | 2017/11/11 14:00 | Tiago Seweryniak v Tomas Coronel | 7-5,6-1 |
| ITF Argentina F1 | 2018/05/14 12:00 | Daniel Alejandro Ortiz v Ramiro Pioli Tizon | 7-5,7-6 |
| ITF Argentina F1 | 2018/05/13 14:30 | Gaston Erhardt v Ramiro Pioli Tizon | 2-6,6-3,4-6 |
| ITF Argentina F1 | 2018/05/12 17:30 | Agustin Visokolskis v Ramiro Pioli Tizon | 2-6,1-6 |