Stadium: Court 2 Round: 26 Ground: Clay
| ITF W25 Daytona Beach | 2020/01/15 16:40 | Quinn Gleason v Mari Osaka | 6-4,3-6,5-7 |
| WTA Houston | 2019/11/14 00:00 | Caty McNally v Mari Osaka | 6-2,6-0 |
| WTA Houston | 2019/11/10 20:00 | Mari Osaka v Deniz Khazaniuk | 6-1,7-5 |
| ITF W60 Playford | 2019/10/30 04:35 | Mari Osaka v Naiktha Bains | 1-6,2-6 |
| ITF W60 Bendigo | 2019/10/23 03:20 | Maddison Inglis v Mari Osaka | 7-5,6-4 |
| ITF W25 Hilton Head Island | 2019/10/11 14:00 | Mari Osaka v Marina Melnikova | 1-6,6-1,3-6 |
| ITF W25 Hilton Head Island | 2019/10/10 14:00 | Mari Osaka v Kylie Collins | 7-5,6-3 |
| ITF W25 Hilton Head Island | 2019/10/08 17:50 | Mari Osaka v Barbara Gatica | 6-3,6-4 |
| ITF W25 Daytona Beach | 2020/01/15 16:50 | Ayano Shimizu v Dalma Galfi | 4-6,2-6 |
| ITF W100 Dubai | 2019/12/09 12:35 | Dalma Galfi v Ana Bogdan | 6-1,4-6,2-6 |
| WTA Houston | 2019/11/15 16:00 | Caty McNally v Dalma Galfi | 6-0,2-6,6-3 |
| WTA Houston | 2019/11/13 18:35 | Dalma Galfi v Whitney Osuigwe | 7-5,2-6,6-2 |
| WTA Houston | 2019/11/11 20:50 | Dalma Galfi v Jamie Loeb | 6-1,7-5 |
| ITF W25 Malibu | 2019/11/07 20:30 | Dalma Galfi v Katrina Scott | 6-7,4-6 |
| ITF W25 Malibu | 2019/11/06 20:20 | Dalma Galfi v Ellie Douglas | 6-4,6-3 |
| ITF W100 Szekesfehervar | 2019/10/23 12:20 | Dalma Galfi v Jana Cepelova | 3-6,6-3,4-6 |