In men’s singles action, Yutthana Jerenphol of Ang Thong secured a decisive victory over Parin Panich of Samut Prakan with a score of 6-1, 6-0. Hendrik Grohbruegger, seeded sixth in Bangkok, came from behind to defeat Natthanyut Nitithanon of Udon Thani, 2-6, 6-3, 6-4. Fourth-seeded Kongtrapp Kongka, also representing Bangkok, advanced by defeating Sutthiphat Yungratok of Nonthaburi 6-1, 6-1. Thanat Sudthiwong from Nakhon Sawan overcame Printhra Kunathat of Ratchaburi in straight sets, 6-3, 6-0. Seventh-seeded Komthach Kitchochok of Bangkok rallied to beat Theeraphat Kantiveeravat of Khon Kaen 4-6, 6-4, 6-2. Rounding out the men’s results, Thanakorn Sirirat, the third seed from Bangkok, defeated Paphangkar Boonrit of Surat Thani with a score of 6-1, 6-2.
On the women’s side, third-seeded Pattarawadee Chanawong of Phra Nakhon Si Ayutthaya dispatched Pimphicha Kongwan of Nonthaburi 6-1, 6-0. Sukritta Sukkaew from Phatthalung emerged victorious against Kanokint Wongphuwarak of Bangkok, 6-3, 6-2. Rio Higashi of Bangkok defeated seventh-seeded Amittalai Prasutnavin of Ratchaburi 6-4, 6-1. Fourth-seeded Lalada Kamhom of Bangkok advanced when Paphichaya Isro of Songkhla retired due to a headache, with the score at 1-0. Pachara Nilthanasana of Phuket dominated Pachrada Neuchari of Samut Songkhram 6-0, 6-0. Finally, Rada Manathawivat of Bangkok bested second-seeded Chotirin Kaewka of Chonburi 6-3, 6-1.