Stadium: Indoor 5 Round: 54 Ground: Hardcourt indoor
| US Pro Tennis Series Women | 2020/05/09 19:00 | Mari Osaka v Chanelle Van Nguyen | 6-2,6-0 |
| US Pro Tennis Series Women | 2020/05/09 14:30 | Mari Osaka v Rushri Wijesundera | 6-1,4-6,10-6 |
| US Pro Tennis Series Women | 2020/05/07 21:20 | Mari Osaka v Jovana Jovic | 6-4,6-1 |
| US Pro Tennis Series Women | 2020/05/07 18:30 | Katerina Stewart v Mari Osaka | 6-1,6-4 |
| US Pro Tennis Series Women | 2020/05/06 23:00 | Mari Osaka v Sofia Sewing | 6-3,6-1 |
| US Pro Tennis Series Women | 2020/05/06 18:30 | Renata Zarazua v Mari Osaka | 3-6,6-4,1-0 |
| ITF W25 Irapuato | 2020/03/12 01:55 | Nadia Podoroska v Mari Osaka | 6-0,6-4 |
| ITF W25 Irapuato | 2020/03/09 18:30 | Mari Osaka v Georgina Garcia-Perez | 7-5,7-6 |
| ITF W25 Naples | 2019/11/17 14:00 | Sarah Hamner v Maria G Carrasco | 3-6,0-6 |