Estadio: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Tokio - Femenino | 2017/11/08 03:20 | Mayo Hibi v Risa Ozaki | 6-1,6-1 |
| ITF W25 Osaka | 2019/02/26 02:40 | Risa Ozaki v Miharu Imanishi | 6-3,1-6,7-10 |
| ITF W25 Osaka | 2019/02/25 02:30 | Risa Ozaki v Olivia Tjandramulia | 4-6,7-6,10-5 |
| ITF W60 Kioto | 2019/02/19 04:35 | Ylena In-Albon v Risa Ozaki | 6-1,6-4 |
| ITF 25 Singapur - Femenino | 2019/01/21 02:00 | Risa Ozaki v Aldila Sutjiadi | 2-6,6-4,4-10 |
| ITF 25 Singapur - Femenino | 2019/01/15 02:00 | Cagla Buyukakcay v Risa Ozaki | 7-6,6-0 |
| ITF W25 Hong Kong | 2019/01/11 02:00 | Shuyue Ma v Risa Ozaki | 7-6,7-5 |
| ITF W25 Hong Kong | 2019/01/10 02:00 | Risa Ozaki v Fatma Al Nabhani | 3-6,6-3,6-4 |
| ITF W25 Hong Kong | 2019/01/09 02:30 | Olivia Tjandramulia v Risa Ozaki | 4-6,2-6 |
| WTA Indian Wells | 2019/02/25 18:00 | Mayo Hibi v Ena Shibahara | 6-2,3-6,4-6 |
| ITF W25 Rancho Santa Fe | 2019/02/20 18:00 | Sachia Vickery v Mayo Hibi | 6-3,6-4 |
| ITF W25 Surprise | 2019/02/15 17:30 | Hua-Chen Lee v Mayo Hibi | 6-1,6-1 |
| ITF W25 Surprise | 2019/02/13 20:35 | Carolina Alves v Mayo Hibi | 4-6,2-6 |
| ITF W100 Midland | 2019/01/29 19:00 | Mayo Hibi v Marie Bouzkova | 7-5,2-6,3-6 |
| WTA Newport Beach | 2019/01/23 18:00 | Mayo Hibi v Claire Liu | 2-6,1-6 |
| WTA Newport Beach | 2019/01/21 21:55 | Anna Danilina v Mayo Hibi | 4-6,4-6 |
| WTA China Taipéi | 2018/11/11 03:45 | Elena-Gabriela Ruse v Mayo Hibi | 7-6,2-6,6-4 |