Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Women Nonthaburi Qual | 2018/07/08 02:00 | Claudia Hoste Ferrer v Ushijima, Risa | 2-6,1-6 |
| ITF Women Nonthaburi Qual | 2018/07/07 05:40 | Yuenyao, Romklao v Ushijima, Risa | 2-6,1-6 |
| ITF Women Daegu | 2018/06/20 01:00 | Ushijima, Risa v Na-Lae Han | 3-6,5-7 |
| Kofu, Singles W-WITF-JPN-02A | 2018/06/12 01:00 | Shiori Fukuda v Ushijima, Risa | 6-3,6-3 |
| ITF Women Singapore | 2018/06/06 02:00 | Jovic, J. v Ushijima, Risa | 6-2,7-5 |
| ITF Women Singapore | 2018/06/05 02:00 | Ushijima, Risa v Aldila Sutjiadi | 7-5,6-2 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 01:15 | Mei Yamaguchi v Ushijima, Risa | 3-6,7-5,7-6 |
| ITF Women Kurume | 2018/05/15 02:40 | Olivia Tjandramulia v Ushijima, Risa | 6-2,2-6,6-4 |
| ITF Women Nonthaburi Qual | 2018/07/08 02:00 | Nina Stadler v Ivana Popovic | 6-3,6-3 |
| ITF Women Nonthaburi Qual | 2018/07/07 03:40 | Nina Stadler v Tanuchaporn Yongmod | 6-2,6-1 |
| ITF Women Verbier | 2018/06/30 09:00 | Nina Stadler v Fiona Ganz | 6-3,1-6,4-6 |
| ITF Women Verbier | 2018/06/29 09:00 | Ochsner, Svenja v Nina Stadler | 2-6,2-6 |
| ITF Women Verbier | 2018/06/28 09:00 | Nina Stadler v Sandy Marti | 6-0,6-4 |
| ITF Women Verbier | 2018/06/27 09:30 | Nina Stadler v Ondrejcekova, Klara | 6-2,6-0 |
| ITF Women Verbier | 2018/06/25 10:05 | Nina Stadler v Luescher, Sophie | 6-7,6-0,6-0 |
| ITF Women Klosters | 2018/06/19 12:30 | Nina Stadler v Gatto-Monticone, Giulia | 3-6,2-6 |