England's Charley Hull and Holly Clyburn were tied for third place and one stroke off the lead at the end of the first round of the RACV Ladies Masters on Queensland's Gold Coast.
Hull, 18, mixed five birdies with two bogeys to finish alongside Clyburn on three-under.
Clyburn, 24, made a birdie and two bogeys on the front nine, but picked up four strokes on the back nine.
South Korean Choi Eun-woo and Oh Su-hyun of Australia lead on four-under.
England's Florentyna Parker shot 71 to take a share of seventh place at the Queensland tournament.