PATTAYA, Thailand -- Jennifer Kupcho of the United States fired a bogey-free 7-under 65 to share the lead alongside four other golfers after the opening round of the LPGA Thailand on Thursday.
The crowded leaderboard was no surprise on the Pattaya Old Course. The average winning score over the past 10 years is 21 under par.
Kupcho's round was highlighted by a birdie-birdie finish and an eagle on the par-5 10th hole at Siam Country Club.
Of her eagle, she said, "I hit a really good drive and had a pretty short club in. Still hybrid but pretty perfect club, and it hit just short of the green and rolled up really close to a tap-in."
With her in the lead were 2014 champion Anna Nordqvist of Sweden, six-time LPGA Tour winner Nasa Hataoka of Japan, local hope and tour rookie Jaravee Boonchant, and last year's runner-up, Lin Xiyu of China.
Three-time major winner Nordqvist birdied her first hole, the 10th, and had eight in all against a lone bogey on the fourth.
Hataoka bogeyed the 13th but finished her round with four consecutive birdies.
Boonchant, who earned her tour card through Q-school in December, also started on the 10th and birdied her first two holes. She sparked Thai fans' hopes for a local victor after former world No. 1 Ariya Jutanugarn won in 2021.
"Amazing," Boonchant said of her day.
Lin started on the back nine and birdied six holes in her 65. Last year, she opened with a 64 and reeled off 66s before losing to Nanna Koerstz Madsen of Denmark on extra holes. Koerstz Madsen began her title defense at 1 over.
World No. 1 Lydia Ko of New Zealand, leading 26 of the top 30 at the event, had a bogey-free round of 68. She has won three of her past four starts.