Stadium: Centre Court Round: 25
| ITF Women SJD Campos Qual | 2018/03/12 14:20 | Guimaraes Bueno, Flavia v Kokeladze, Kamilla | 6-4,6-3 |
| ITF Women SJD Campos Qual | 2018/03/11 14:00 | Guimaraes Bueno, Flavia v Martini, Raquel | 6-0,6-3 |
| ITF Women Campinas Qual | 2018/03/05 14:45 | Escauriza, Lara v Guimaraes Bueno, Flavia | 6-1,6-3 |
| ITF Women Campinas Qual | 2018/03/04 14:00 | Drozd Pereira, Erika v Guimaraes Bueno, Flavia | 0-6,6-3,4-6 |
| Sao Paulo, Singles Qualifying W-WITF-BRA-02A | 2018/02/25 14:30 | Guimaraes Bueno, Flavia v Petit, Stephanie Mariel | 3-6,2-6 |
| ITF Women Curitiba Qual | 2018/02/17 12:30 | Vazquez, Maria Del Rosario v Guimaraes Bueno, Flavia | 3-6,6-3,7-5 |
| ITF Women Luque | 2017/12/18 13:30 | Lucero, Carla v Guimaraes Bueno, Flavia | 6-2,6-4 |
| ITF Women Santa Cruz | 2017/12/13 23:00 | Guimaraes Bueno, Flavia v Noelia Zeballos | 0-6,3-6 |
| Campinas, Singles W-WITF-BRA-03A | 2018/03/08 16:15 | Gatica, Barbara v Gabriela Ce | 1-6,2-6 |
| Campinas, Singles W-WITF-BRA-03A | 2018/03/07 14:00 | Gatica, Barbara v Julieta Lara Estable | 4-6,6-3,6-4 |
| Sao Paulo, Singles Qualifying W-WITF-BRA-02A | 2018/02/24 15:30 | Gatica, Barbara v Ryngler, Alexa | 2-6,4-6 |
| ITF Women Curitiba Qual | 2018/02/19 15:50 | Gatica, Barbara v Ho, Jessica | 3-6,6-3,2-6 |
| ITF Women Curitiba Qual | 2018/02/18 14:00 | Gatica, Barbara v Julia Konishi Camargo Silva | 6-1,6-2 |
| ITF Women Santa Cruz | 2017/12/14 21:30 | Ana Sofia Sanchez v Gatica, Barbara | 6-2,6-2 |
| ITF Women Santa Cruz | 2017/12/11 22:05 | Rebeca Pereira v Gatica, Barbara | 4-6,3-6 |
| ITF Women Santiago | 2017/12/08 15:50 | Brito, Fernanda v Gatica, Barbara | 6-1,6-4 |