| ITF Women Lawrence | 2018/11/04 16:30 | Jackson, Emma v Okuno, Ayaka | 7-6,6-4 |
| ITF Women Lawrence | 2018/11/03 16:00 | Poile, Miranda v Okuno, Ayaka | 6-2,0-6,1-6 |
| ITF Women Toronto | 2018/10/27 15:25 | Okuno, Ayaka v Shaffer, Kennedy | 3-6,0-6 |
| ITF Women Saguenay | 2018/10/20 20:20 | Dasha Ivanova v Okuno, Ayaka | 6-3,7-5 |
| ITF Women Charleston | 2018/10/01 13:00 | Okuno, Ayaka v Jaeda Daniel | 2-6,0-6 |
| ITF Women Charleston | 2018/09/30 13:00 | Okuno, Ayaka v Allie Gretkowski | 6-1,7-5 |
| ITF Women Hilton Head | 2018/09/26 13:00 | Ksenia Kuznetsova v Okuno, Ayaka | 6-4,6-2 |
| ITF Women Lubbock | 2018/09/15 14:00 | Yolande Leacock v Okuno, Ayaka | 6-4,6-2 |
| ITF Women Lawrence | 2018/11/05 15:00 | Khrystyna Vozniak v Peyton Stearns | 1-6,1-6 |
| ITF Women Lawrence | 2018/11/04 15:00 | Monica Robinson v Khrystyna Vozniak | 6-1,3-6,6-7 |