Stadium: Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF Women Nonthaburi | 2018/11/03 02:00 | Pei-Ju Chien v Natthapat Piwbangruk | 6-2,6-0 |
| ITF Women Nonthaburi | 2018/09/02 02:00 | Chanikarn Silakul v Natthapat Piwbangruk | 6-1,6-1 |
| ITF Women Nonthaburi | 2018/09/01 06:00 | Natthapat Piwbangruk v Tanuchaporn Yongmod | 6-3,7-5 |
| ITF Women Nonthaburi | 2018/08/28 07:05 | Ziyue Sun v Natthapat Piwbangruk | 3-6,6-1,6-0 |
| ITF Women Nonthaburi | 2018/08/26 03:30 | Jaipet Anontaweesil v Natthapat Piwbangruk | 1-6,3-6 |
| ITF Women Nonthaburi | 2018/08/25 02:00 | Natthapat Piwbangruk v Vivian Mayumi Toma | 6-3,6-1 |
| ITF Women Hua Hin Qual | 2018/06/02 03:00 | Sowjanya Bavisetti v Natthapat Piwbangruk | 6-2,6-0 |
| ITF Women Hua Hin Qual | 2018/05/26 02:30 | Natthapat Piwbangruk v Irawan Deewajee | 1-6,2-6 |
| ITF Women Nonthaburi | 2018/11/10 02:00 | Aaliya Ebrahim v Guntisa Boonlaing | 6-2,6-0 |