Stadium: Cancha 1 Round: 26 Ground: Clay
| ITF W25 Guayaquil | 2019/08/13 16:20 | Treyes Albarracin, Joselyn Margarita v Maria Jose Portillo Ramirez | 2-6,1-6 |
| ITF W15 Cancun | 2019/08/02 13:30 | Anhzelika Isaeva v Maria Jose Portillo Ramirez | 3-6,6-4,6-3 |
| ITF W15 Cancun | 2019/08/01 15:25 | Akler, Yarden v Maria Jose Portillo Ramirez | 1-6,1-6 |
| ITF W15 Cancun | 2019/07/30 15:30 | Koldobski, Koral v Maria Jose Portillo Ramirez | 1-6,3-6 |
| ITF W15 Cancun | 2019/07/24 13:30 | Maria Jose Portillo Ramirez v Appel, Madison | 2-6,6-1,3-6 |
| ITF W15 Cancun | 2019/05/17 13:30 | Maria Jose Portillo Ramirez v Weedon, Kirsten-Andrea | 2-6,2-6 |
| ITF W15 Cancun | 2019/05/14 13:30 | Maria Jose Portillo Ramirez v Sandor-Zur, Erika | 6-0,6-0 |
| ITF W15 Cancun | 2019/05/12 15:00 | Marcela Zacarias v Maria Jose Portillo Ramirez | 6-3,6-1 |
| ITF W25 Guayaquil | 2019/08/14 15:00 | Reasco Gonzalez, Mell Elizabeth v Osaka, Mari | 6-7,3-6 |
| ITF W25 Porto | 2019/07/27 12:00 | Osaka, Mari v Georges, Myrtille | 6-7,5-7 |
| ITF W25 Porto | 2019/07/26 12:05 | Pemra Ozgen v Osaka, Mari | 4-6,1-6 |
| ITF W25 Porto | 2019/07/25 19:55 | Shrivalli Rashmikaa Bhamidipaty v Osaka, Mari | 3-6,2-6 |
| ITF W25 Porto | 2019/07/24 14:05 | Sarah Beth Grey v Osaka, Mari | 5-7,5-7 |
| Palmela, Singles W-ITF-POR-03A | 2019/07/16 10:15 | Osaka, Mari v Eden Silva | 6-4,1-6,4-6 |
| ITF W25 Corroios-Seixal | 2019/07/04 12:45 | Osaka, Mari v Hourigan, Paige Mary | 6-7,4-6 |
| ITF W25 Corroios-Seixal | 2019/07/03 16:55 | Osaka, Mari v Schaeder, Laura | 6-0,6-4 |