Green's bogey-free opening round has her tied with American Stacy Lewis, who is making her sixth LPGA Tour start since giving birth in late October, with another Aussie in Minjee Lee a shot back in third.

“My ball-striking was great, but also my putter was really hot,” Green said.

“I was really happy with how I rolled it ... I think whoever wins this week will have the least amount of putts.”

Compatriot Lee drained five birdies in her bogey-free round of 66.

Green’s fellow West Australian Minjee Lee sits one shot back after a bogey-free 66, PHOTO: Yong Teck Lim/Getty Images.

“It was pretty solid all round,” said the World No.4 Lee.

“I just hit the greens and then if I was close, I would try and take opportunity of my birdie chances. If not, then I would be able to have a par.”

Canada's Anne-Catherine Tanguay sits in fourth after shooting a 67.

Tanguay’s fellow Canadian, and last week’s winner, Brooke Henderson had a 68, as did Queenslander Sarah Jane Smith and South Korea's Inbee Park, while World No.2 Sung Hyun Park shot 76.

Defending her maiden LPGA Tour title, Moriya Jutanugarn opened with a 71, while Jessica Korda had a 74, playing a four-hole stretch in five-over with three straight bogeys and a double bogey. Lexi Thompson also struggling, recording an opening 75.