Stadium: Center Court Round: 54 Ground: Clay
| St. Pölten, Qualifications Simples W-ITF-AUT-01B | 2019/09/10 10:05 | Osaka, Mari v Caroline Werner | 2-6,1-6 |
| ITF W60 Montreux | 2019/09/06 14:50 | Alice Rame v Osaka, Mari | 6-0,6-4 |
| ITF W60 Montreux | 2019/09/05 10:30 | Osaka, Mari v Minella, Mandy | 6-1,3-6,6-4 |
| ITF W60 Montreux | 2019/09/04 08:00 | Fiona Ganz v Osaka, Mari | 4-6,2-6 |
| ITF W25 Guayaquil | 2019/08/21 15:00 | Osaka, Mari v Camila Romero | 6-2,5-7,4-6 |
| ITF W25 Guayaquil | 2019/08/16 18:15 | Talaba, Gabriela v Osaka, Mari | 6-4,6-3 |
| ITF W25 Guayaquil | 2019/08/15 15:00 | Maria Jose Portillo Ramirez v Osaka, Mari | 3-6,2-6 |
| ITF W25 Guayaquil | 2019/08/14 15:00 | Mell E R Gonzalez v Osaka, Mari | 6-7,3-6 |
| Saint-Malo, Singles W-ITF-FRA-15A | 2019/09/16 11:35 | Wargnier, Lucie v Palkina, Ksenia | 6-2,6-4 |
| ITF W25 Trieste | 2019/09/03 09:15 | Tatiana Pieri v Wargnier, Lucie | 7-5,6-0 |
| ITF W25 Trieste | 2019/09/02 10:00 | Bertoloni, Anita v Wargnier, Lucie | 1-6,3-6 |
| ITF W25 Verbier | 2019/08/26 07:00 | Wargnier, Lucie v Tina Nadine Smith | 6-7,6-7 |
| ITF W15 Wanfercee-Baulet | 2019/08/23 09:00 | Wargnier, Lucie v Arbuthnott, Emily | 0-6,0-6 |
| ITF W15 Wanfercee-Baulet | 2019/08/22 13:00 | Wargnier, Lucie v Clara Vlasselaer | 6-3,6-1 |
| ITF W15 Wanfercee-Baulet | 2019/08/21 07:30 | Wargnier, Lucie v Glaude, Laure Line | 6-1,6-0 |
| ITF W25 Koksijde | 2019/08/09 14:00 | Wargnier, Lucie v Magali Kempen | 2-6,1-6 |