Round: 62 Ground: Clay
| ITF Argentina F1 | 2018/05/12 14:00 | Julian Cundom v Marcos Castares | 6-1,7-5 |
| 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 Bolivia F3 - Qual. | 2017/09/30 13:30 | Tiago Seweryniak v Juan Martin Jalif | 2-6,6-7 |
| ITF Bolivia F2 - Qual. | 2017/09/23 16:00 | Tiago Seweryniak v Cleiner Caceres | 1-6,2-6 |
| ITF Bolivia F1 | 2017/09/16 14:00 | Tiago Seweryniak v Andre Ku Meza | 6-7,2-6 |