Stadion: Court 4 Round: 54
| ITF Damen - Asuncion | 2018/08/25 14:00 | Mariana Galvao Borges v Haley Giavara | 1-6,2-6 |
| ITF Damen - Lambare | 2018/08/19 15:00 | Mariana Galvao Borges v Alexia J Romero | 2-6,5-7 |
| ITF Damen - Guayaquil | 2018/08/12 16:00 | Mariana Galvao Borges v Dolores Molina Portela | 3-6,2-6 |
| ITF Damen - Guayaquil | 2018/08/07 15:00 | Fiona Codino v Mariana Galvao Borges | 6-3,6-1 |
| ITF Damen - SJD Campos - Qualifikation | 2018/03/10 16:00 | Caroline Furlaneto v Mariana Galvao Borges | 6-2,6-3 |
| ITF Damen - Campinas - Qualifikation | 2018/03/03 14:00 | Mariana Galvao Borges v Raquel Martini | 0-6,5-7 |
| ITF Damen - Sao Paulo - Qualifikation | 2018/02/24 12:00 | Mariana Galvao Borges v Madison Bourguignon | 1-6,0-6 |
| ITF Damen - Curitiba - Qualifikation | 2018/02/18 19:10 | Mirjam Bjorklund v Mariana Galvao Borges | 6-0,6-0 |