(Reuters) - Thailand's Patty Tavatanakit carded a brilliant eight-under-par 64 to join compatriot Atthaya Thitikul in the lead after the opening round of the $1.6 million Honda LPGA Thailand on Thursday, with the pair ahead by a shot.
ANA Inspiration winner Patty, who captured her maiden major last month in her rookie year on tour, rolled in the last of her nine birdies on the par-five 18th hole to surge ahead.
The only blip for the 21-year-old on a sweltering day at the Siam Country Club in Chon Buri was a double-bogey on the sixth hole of the Pattaya Old Course.
"It was a solid round today. I didn't expect to shoot this low, I wasn't feeling my best," Patty said.
Atthaya also excelled in the heat with two eagles - on the 10th and the final hole - to stay in contention for her first title on the LPGA Tour.
"Today it was so hot but I just tried to keep my momentum going, keep rolling the putts," Atthaya, who also shot five birdies, said.
"I gave myself a lot of chances to make birdies, if I made them that's good, if not just continue. I'm used to the heat but I don't know the course that well."
Another local favourite Ariya Jutanugarn, a two-times major winner, was tied-third alongside Denmark's Nanna Koerstz Madsen after hitting 65 - a double-bogey on the 18th ruining her chances of joining the pair at the top.
South Korea's Kim Hyo-joo, who won last week's HSBC Women's World Championship in Singapore as the LPGA returned to Asia for the first time in 18 months, was tied for 54th place after a disappointing round of 73.
(Reporting by Shrivathsa Sridhar in Bengaluru; Editing by Kim Coghill)