Lexi Thompson had two eagles in an 8-under 64 Thursday to take a one-stroke lead over Q Baek at the LPGA Tour's Thailand tournament.

Amy Yang, the defending champion, shot 66 and was two strokes behind after the first round. Two golfers were tied for fourth after opening 68s — Azahara Munoz and Jenny Shin.

"Two eagles definitely helps out the scorecard," Thompson said. "We couldn't have asked for better conditions, weather-wise and golf course, so just happy to be out here."

The 20-year-old Baek won her first and only LPGA title on home soil in South Korea in 2014. She had an eagle and five birdies in her round of 65.