| ITF Women Sandelfjord | 2018/07/23 14:35 | Katja Wiersholm v Mary Closs | 4-6,5-7 |
| ITF Women Brussels Qual | 2018/07/14 09:00 | Mary Closs v Kristy Jorgensen | 6-2,1-6,2-6 |
| ITF Women Knokke | 2018/07/09 08:00 | Mary Closs v Anna Kubareva | 6-7,1-6 |
| ITF Women Baton Rouge Qual | 2018/06/17 14:00 | Connie Ma v Mary Closs | 6-2,7-5 |
| ITF Women Sumter Qual | 2018/06/10 13:00 | Abigail Forbes v Mary Closs | 6-3,6-3 |
| ITF Women Bethany Beach Qual | 2018/06/04 14:00 | Maegan Manasse v Mary Closs | 6-4,1-6,6-1 |
| ITF Women Osprey Qual | 2018/05/21 14:00 | Ksenia Laskutova v Mary Closs | 6-1,6-1 |
| ITF Women Charlottesville Qual | 2018/04/22 18:05 | Mary Closs v Marine Partaud | 2-6,2-6 |
| ITF Women Sandelfjord | 2018/07/24 11:55 | Dorthea Faa Hviding v Yukina Saigo | 1-6,2-6 |
| ITF Women Amstelveen | 2018/07/12 10:25 | Marina Yudanov v Yukina Saigo | 6-2,6-4 |
| ITF Women Amstelveen | 2018/07/11 11:10 | Yukina Saigo v Stephanie Judith Visscher | 6-2,6-2 |
| ITF Women Den Haag | 2018/07/03 08:00 | Yukina Saigo v Julyette M J Steur | 2-6,4-6 |
| ITF Women Karuizawa | 2018/05/22 03:05 | Kanako Morisaki v Yukina Saigo | 4-6,6-3,6-2 |
| ITF Women Karuizawa Qual | 2018/05/21 02:55 | Yukina Saigo v Chihiro Takayama | 6-1,6-1 |
| ITF Women Kurume Qual | 2018/05/14 01:00 | Yukina Saigo v Sakura Hondo | 3-6,6-4,5-7 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Moyuka Uchijima v Yukina Saigo | 6-1,3-6,1-6 |