Stadium: Center Court Round: 54 Ground: Clay
| ITF W25 St. Poelten | 2019/09/10 10:05 | Mari Osaka v Caroline Werner | 2-6,1-6 |
| ITF W60 Montreux | 2019/09/06 14:50 | Alice Rame v Mari Osaka | 6-0,6-4 |
| ITF W60 Montreux | 2019/09/05 10:30 | Mari Osaka v Mandy Minella | 6-1,3-6,6-4 |
| ITF W60 Montreux | 2019/09/04 08:00 | Fiona Ganz v Mari Osaka | 4-6,2-6 |
| ITF W25 Guayaquil | 2019/08/21 15:00 | Mari Osaka v Camila Romero | 6-2,5-7,4-6 |
| ITF W25 Guayaquil | 2019/08/16 18:15 | Gabriela Talaba v Mari Osaka | 6-4,6-3 |
| ITF W25 Guayaquil | 2019/08/15 15:00 | Maria Jose Portillo Ramirez v Mari Osaka | 3-6,2-6 |
| ITF W25 Guayaquil | 2019/08/14 15:00 | Mell E R Gonzalez v Mari Osaka | 6-7,3-6 |
| ITF W60 Saint-Malo | 2019/09/16 11:35 | Lucie Wargnier v Ksenia Palkina | 6-2,6-4 |
| ITF W25 Trieste | 2019/09/03 09:15 | Tatiana Pieri v Lucie Wargnier | 7-5,6-0 |
| ITF W25 Trieste | 2019/09/02 10:00 | Anita Bertoloni v Lucie Wargnier | 1-6,3-6 |
| ITF W25 Verbier | 2019/08/26 07:00 | Lucie Wargnier v Tina Nadine Smith | 6-7,6-7 |
| ITF W15 Wanfercee-Baulet | 2019/08/23 09:00 | Lucie Wargnier v Emily Arbuthnott | 0-6,0-6 |
| ITF W15 Wanfercee-Baulet | 2019/08/22 13:00 | Lucie Wargnier v Clara Vlasselaer | 6-3,6-1 |
| ITF W15 Wanfercee-Baulet | 2019/08/21 07:30 | Lucie Wargnier v Laure Line Glaude | 6-1,6-0 |
| ITF W25 Koksijde | 2019/08/09 14:00 | Lucie Wargnier v Magali Kempen | 2-6,1-6 |