Hannah Green has produced a birdie blitz to be just one shot off the lead after the first round of the LPGA Tour's Portland Classic.
Green reeled off eight birdies in a 15-hole stretch en route to a six-under-par 66 start at Columbia Edgewater Country Club in Oregan.
The Australian trails only Ayako Uehara, who opened with a seven-under 65 on Thursday.
Green would have led the Japanese by two strokes had she not bogeyed the last hole and Uehara not finished with successive birdies.
Like Green, Uehara rolled in eight birdies but recorded just one bogey.
World No.2 Nelly Korda opened with a five-under 67 to be tied for third with fellow American Caroline Inglis and Japan's Ayaka Furue and Hinako Shibuno.
Uehara both started and finished her round strongly, making five birdies on the front nine and three more over her final four holes.
The 38-year-old has won three times in Japan but is seeking her first LPGA Tour victory and said being out front wouldn't affect how she approached the second round.
"I will do just my game and then focus one at a time," Uehara said.
Green, a major winner and the 2019 Portland champion, sandwiched eight birdies between her two bogeys at the third and 18th holes. She birdied three of the four par-5 holes on the course and both par-3s on the back nine.
"Unfortunately made a bogey on the last, but don't want to dwell on that," Green said. "I guess I didn't hit a great shot, but I also got unlucky where I finished up.
"Only missed two greens today, so I can't be too down on myself. Yeah, just keep giving myself opportunities, and, yeah, hopefully continue to hole those putts."
Ranked No.17 in the world, Green is looking for her first LPGA victory since the 2019 win in Portland. She finished second in April at the DIO Implant LA Open and shot a nine-under 62 in the second round of the Dana Open earlier this month before finishing 10th.
After missing four months of the season with a blood clot, Korda is searching for her first victory of the year after tying for second twice, including in her last start, the CP Women's Open.
Evian Championship winner Brooke Henderson of Canada opened with a four-under 68. She was tied for seventh with countrywoman Alena Sharp, Lilia Vu, Anne van Dam of the Netherlands, Jenny Shin of South Korea and Tiffany Chan of Hong Kong.
Defending champion and world No.1 Jin Young Ko of South Korea withdrew earlier this week to rest a wrist injury.