Minjee Lee has continued her fine run of form, shooting a flawless five-under-par 67 in the opening round of the LPGA Tour's BMW Ladies Championship in South Korea.
Australia's world No.6 made five birdies on the LPGA International Busan course to be tied seventh, three shots behind leader Na Rin An.
Lee is enjoying a purple patch of form that has yielded five top-five finishes in her last eight tournaments, including her maiden major triumph.
Fellow Australian Hannah Green is only a shot further back after a much more varied round, mixing seven birdies with three bogeys.
Jin Young Ko couldn't quite manage an LPGA Tour scoring record for consecutive rounds in the 60s but her South Korean compatriots packed the leaderboard after the first round.
Ko had 14 straight under-60 rounds, tying her with Annika Sorenstam (2005) and So Yeon Ryu (2015-17) for the most in tour history, going into Thursday's first round but finished with a one-under 71.
In Gee Chun and Ju Young Pak had 65s and were tied for second while American Danielle Kang, whose father was born in Busan, shot 66 and was in a group tied for fourth.
Defending champion Ha Na Jang, who won the Busan tournament when it was last played in 2019, shot 74.
The Busan tournament is the only Asia event in the so-called fall season. The LPGA started out with a four-tournament Asia swing until tournaments in Shanghai, Japan and Taiwan were either cancelled or removed from the schedule.
There are two tournaments left before the season-ending CME Group Tour Championship in Florida.
Australian Associated Press