Stadium: Grandstand Round: 54 Ground: Clay
| ITF W25 Daytona Beach | 2020/01/16 14:30 | Mari Osaka v Dalma Galfi | 2-6,0-6 |
| 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 Daytona Beach | 2020/01/14 16:40 | Guiomar Maristany Zuleta De Reales v Charlotte Chavatipon | 6-4,6-3 |
| ITF W60 Las Vegas | 2019/11/06 17:00 | Alexa Glatch v Charlotte Chavatipon | 7-6,6-4 |
| ITF W60 Las Vegas | 2019/11/05 16:55 | Mirabelle Brettkelly v Charlotte Chavatipon | 2-6,1-6 |
| ITF W60 Las Vegas | 2019/11/04 16:55 | Charlotte Chavatipon v Jacqueline Cako | 6-4,6-4 |
| ITF W15 Austin | 2019/10/26 17:30 | Bianca Turati v Charlotte Chavatipon | 6-3,6-2 |
| ITF W15 Austin | 2019/10/25 16:00 | Charlotte Chavatipon v Anastasia Sysoeva | 6-2,6-1 |
| ITF W15 Austin | 2019/10/24 18:50 | Maria Lourdes Carle v Charlotte Chavatipon | 3-6,3-6 |
| ITF W15 Austin | 2019/10/22 16:00 | Charlotte Chavatipon v Brittany Collens | 6-1,6-4 |