| ITF Women Nonthaburi Qual | 2018/07/07 02:00 | Claudia Hoste Ferrer v Dolavee Tumthong | 6-3,6-3 |
| ITF Women Hua Hin Qual | 2018/06/03 03:00 | Dolavee Tumthong v Jia Qi Ren | 1-6,2-6 |
| ITF Women Hua Hin Qual | 2018/05/27 02:30 | Nudnida Luangnam v Dolavee Tumthong | 6-1,6-2 |
| ITF Women Hua Hin Qual | 2018/05/26 02:30 | Mariana Correa v Dolavee Tumthong | 3-6,6-2,3-6 |
| ITF Women Hua Hin | 2018/05/08 03:30 | Dolavee Tumthong v Yi Tsen Cho | 0-6,1-6 |
| ITF Women Hua Hin Qual | 2018/05/07 02:30 | Dolavee Tumthong v Qianxin Kong | 7-5,6-4 |
| ITF Women Hua Hin Qual | 2018/05/05 03:00 | Jiahuan He v Dolavee Tumthong | 4-6,3-6 |
| ITF Women Hua Hin Qual | 2018/04/29 05:00 | Dolavee Tumthong v Thasaporn Naklo | 3-6,2-6 |
| ITF Women Nonthaburi Qual | 2018/07/08 03:10 | Mei Yamaguchi v Gabriella Da Silva Fick | 6-7,1-6 |
| ITF Women Nonthaburi Qual | 2018/07/07 04:00 | Mei Yamaguchi v Ramya Natarajan | 4-6,6-1,6-1 |
| ITF Women Kofu | 2018/06/13 02:40 | Misaki Doi v Mei Yamaguchi | 6-3,6-3 |
| ITF Women Karuizawa | 2018/05/25 03:35 | Mei Yamaguchi v Abbie Myers | 4-6,4-6 |
| ITF Women Karuizawa | 2018/05/24 06:15 | Ayano Shimizu v Mei Yamaguchi | 4-6,6-1,4-6 |
| ITF Women Karuizawa | 2018/05/24 01:15 | Mei Yamaguchi v Risa Ushijima | 3-6,7-5,7-6 |
| ITF Women Kurume Qual | 2018/05/13 09:50 | Mei Yamaguchi v Kotomi Takahata | 6-3,3-6,4-6 |
| ITF Women Fukuoka | 2018/05/09 04:20 | Mei Yamaguchi v Arina Rodionova | 0-6,5-7 |