Stadium: Court A Round: 25 Ground: Hardcourt outdoor
| ITF Women Nonthaburi Qual | 2018/07/14 02:00 | Tumthong, Dolavee v Mei Yamaguchi | 3-6,2-6 |
| ITF Women Nonthaburi Qual | 2018/07/07 02:00 | Claudia Hoste Ferrer v Tumthong, Dolavee | 6-3,6-3 |
| ITF Women Hua Hin Qual | 2018/06/03 03:00 | Tumthong, Dolavee v Ren, Jia Qi | 1-6,2-6 |
| ITF Women Hua Hin Qual | 2018/05/27 02:30 | Luangnam, Nudnida v Tumthong, Dolavee | 6-1,6-2 |
| ITF Women Hua Hin Qual | 2018/05/26 02:30 | Correa, Mariana v Tumthong, Dolavee | 3-6,6-2,3-6 |
| Hua Hin, Singles W-WITF-THA-07A | 2018/05/08 03:30 | Tumthong, Dolavee v Yi Tsen Cho | 0-6,1-6 |
| ITF Women Hua Hin Qual | 2018/05/07 02:30 | Tumthong, Dolavee v Kong, Qianxin | 7-5,6-4 |
| ITF Women Hua Hin Qual | 2018/05/05 03:00 | He, Jiahuan v Tumthong, Dolavee | 4-6,3-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/21 02:00 | Ya-Hsuan Lee v Zhang, Kai Lin | 6-1,6-3 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/20 06:30 | Kato, Miyu v Ya-Hsuan Lee | 3-6,4-6 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/20 02:00 | Ya-Hsuan Lee v Kaylah McPhee | 6-4,4-6,6-4 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/19 04:50 | Ma, Shuyue v Ya-Hsuan Lee | 6-3,3-6,4-6 |
| ITF Women Daegu | 2018/06/20 02:50 | Jeong, Yeong Won v Ya-Hsuan Lee | 0-6,7-6,2-6 |
| ITF Women Sangju | 2018/06/10 01:00 | Ho Ching Wu v Ya-Hsuan Lee | 7-5,6-3 |
| ITF Women Sangju | 2018/06/09 01:00 | Jeong, Sunam v Ya-Hsuan Lee | 2-6,6-7 |
| ITF Women Sangju | 2018/06/08 02:00 | Okuno, Ayaka v Ya-Hsuan Lee | 2-6,0-6 |