Stadium: Court 8 Round: 25
| ITF Women Campinas | 2018/03/06 14:00 | Victoria Bosio v Stephanie Mariel Petit | 6-4,6-3 |
| ITF Women Sao Paulo Qual | 2018/02/26 16:25 | Gabriela Ce v Stephanie Mariel Petit | 6-4,6-1 |
| ITF Women Sao Paulo Qual | 2018/02/25 14:30 | Flavia Guimaraes Bueno v Stephanie Mariel Petit | 3-6,2-6 |
| ITF Women Sao Paulo Qual | 2018/02/24 15:30 | Nicolly Ferreira v Stephanie Mariel Petit | 0-6,1-6 |
| 2018 Fed Cup | 2018/02/10 18:30 | Maria Paulina Perez Garcia v Stephanie Mariel Petit | 4-6,4-6 |
| ITF Women Santa Cruz | 2017/12/14 21:30 | Nathaly Kurata v Stephanie Mariel Petit | 2-6,6-4,7-5 |
| ITF Women Santa Cruz | 2017/12/13 21:30 | Marcela G. Bueno v Stephanie Mariel Petit | 3-6,1-5 |
| ITF Women Santa Cruz | 2017/12/13 21:30 | Marcela-Guimaraes Bueno v Stephanie Mariel Petit | 3-6,1-6 |