German Tatjana Maria, the No 4 seed, beat Dutch qualifier Arianne Hartono 6-3, 6-1 to advance to the second round of the Thailand Open at the True Arena Hua Hin.

Maria, ranked No 44, will play the winner of the match between Slovenian Tamara Zidansek and American Katie Volynets next.

Hua Hin WTA 250, other first-round results (True Arena Hua Hin, hard, USD 267.082, most recent results first):

• Thasaporn Naklo vs. Yulia Putintseva
• Taylah Preston vs. Lin Zhu
• Alina Korneeva vs. Yafan Wang
• Linda Fruhvirtova vs. Anastasia Tikhonova
• Zhuoxuan Bai vs. Chloe Paquet
• Anna Karolina Schmiedlova vs. Mai Hontama
• Yue Yuan vs. Arina Rodionova: tuesday
• Tamara Zidansek vs. Katie Volynets: tuesday
• Paula Badosa beat Lanlana Tararudee (WC): 3-6, 6-4, 6-1
• Viktorija Golubic beat Laura Pigossi: 6-1, 6-2
• Xinyu Wang (3) beat Emina Bektas: 5-2 ret.
• Diana Shnaider beat Magda Linette (1): 6-4, 1-6, 6-1
• Dalma Galfi (Q) beat Ajla Tomljanovic (WC): 6-3, 6-0
• Nao Hibino beat Kamilla Rakhimova: 7-6 (4), 6-0
• Xiyu Wang (5) beat Qiang Wang: 6-1, 6-1