Stadium: C Round: 28
| ITF Women Florence | 2018/10/19 14:00 | Katie Volynets v Sherazad Reix | 4-6,7-5,6-1 |
| ITF Women Florence | 2018/10/18 14:00 | Emina Bektas v Katie Volynets | 2-6,3-6 |
| ITF Women Florence | 2018/10/17 16:40 | Anna Danilina v Katie Volynets | 2-6,3-6 |
| ITF Women Florence | 2018/10/16 14:00 | Katie Volynets v Arianne Hartono | 2-6,7-6,6-1 |
| ITF Women Florence | 2018/10/15 14:00 | Katie Volynets v Zoe Cauthen | 6-0,6-0 |
| ITF Women Florence | 2018/10/14 17:00 | Ana Veselinovic v Katie Volynets | 3-6,0-6 |
| ITF Women Stockton | 2018/10/03 17:30 | Katie Volynets v Whitney Osuigwe | 5-7,1-6 |
| ITF Women Stockton | 2018/10/01 17:00 | Katie Volynets v Ellie Douglas | 3-6,6-3,6-2 |
| ITF Women Florence | 2018/10/19 14:00 | Mari Osaka v Paula Cristina Goncalves | 5-7,6-4,6-1 |
| ITF Women Florence | 2018/10/18 14:00 | Ulrikke Eikeri v Mari Osaka | 1-6,3-6 |
| ITF Women Florence | 2018/10/16 17:55 | Quinn Gleason v Mari Osaka | 1-6,6-7 |
| ITF Women Stockton | 2018/10/04 22:30 | Mari Osaka v Robin Anderson | 5-7,4-6 |
| ITF Women Stockton | 2018/10/03 20:55 | Mari Osaka v Maria Sanchez | 6-1,6-3 |
| WTA - Tokyo | 2018/09/15 01:00 | Mari Osaka v Antonia Lottner | 3-6,6-4,3-6 |
| ITF Women Montreux | 2018/09/07 13:00 | Kimberley Zimmermann v Mari Osaka | 7-5,6-4 |
| ITF Women Montreux | 2018/09/06 08:00 | Mari Osaka v Martina Trevisan | 6-3,6-2 |