Stadium: C Round: 25
| ITF Women Amstelveen | 2018/07/08 09:30 | Cassandre Thebault v Dorthea Faa Hviding | 6-3,6-1 |
| 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 |
| ITF Women Fukuoka Qual | 2018/05/07 03:55 | Yukina Saigo v Erina Hayashi | 4-6,5-7 |