In her best start to a tournament since joining the LPGA Tour, Hong Kong's Tiffany Chan Tsz-ching fired a six-under par 65 in the first round of the Los Angeles Open, leaving her just one stroke behind leader Jessica Korda.
Chan, 27, made seven birdies including four in a row from the fifth through the eighth at Wilshire Country Club, as she unexpectedly stormed into title contention.
Chan, who played college golf at the University of Southern California, said her familiarity with the course was a big help.
"My goal was to try not to be too aggressive because it's my home course so I know the course really well,'' Chan said.
"So, I still tried to be a little more conservative.''
She is tied for second with former champion Moriya Jatanugarn, the Thai star recovering from a rocky start that featured a double bogey and two bogeys in five holes.
In her fourth season on the tour, Chan missed the cut in her first tournament of the year. But she rebounded in her next two tournaments to finish tied for 64th at the Kia Classic and the Lotte Championship, won last weekend by New Zealand's Lydia Ko.
A birdie-birdie finish lifted Korda to the top of the leaderboard on seven-under 64.
Korda hit 17 of 18 greens in regulation as she put herself in position to add a second title this season to the Tournament of Champions trophy she lifted in January. "I had a good day," said the 28-year-old American. "I just kept myself in position and was able to capitalize on the six-footers to 10-footers that I gave myself for birdie."
Korda's younger sister Nelly stood fourth on five-under alongside Austin Ernst, Spain's Carlota Ciganda, Australian Su Oh and American Dana Finkelstein.
World No 1 Ko Jin Young and No 3 Kim Sei Young, of South Korea, were among a group of eight players on four-under 67.