PHOENIX - New Zealand teen Lydia Ko fired a five-under par 67 Saturday to seize a one-stroke lead after three rounds of the LPGA Founders Cup.
The South Korean-born world number four, seeking her first professional LPGA title, stood on 16-under par 200 through 54 holes at Wildfire Golf Club.
Jessica Korda, the 21-year-old US daughter of retired tennis star Petr Korda; and South Korean rookie Mirim Lee, in her third LPGA event and US debut; shared second on 201 with South Korean Yoo Sun-Young another shot back.
Ko, 16, won back-to-back LPGA Canadian Women's Open titles as an amateur and could have another breakthrough two weeks before the first women's major event of the year, the Kraft Nabisco Championship.
Ko birdied the par-5 second and eagle the par-5 fifth, then began the back nine with a birdie to solidify her run to the top of the leaderboard.
After taking her lone bogey at the 12th, Ko responded with birdies at the par-5 15th and par-3 17th to stay in command.
Korda, 21, won her second LPGA title in January at the Bahamas. She also captured the 2012 Women's Australian Open.
Korda's second bogey-free round in a row began with a birdie and she followed with birdies at the third, fifth and par-5 11th holes, then closed with back-to-back birdies to put herself in Sunday's final pairing with Ko.
Lee, 23, has won three times on the South Korean women's tour but could take the biggest win of her career after leading through the first and second rounds.
Lee birdied the second but took a bogey at the third. She answered with birdies at the sixth and seventh holes and another at 11 but stumbled again with a bogey at the 15th that cost her a share of the 54-hole lead.
US star Michelle Wie, Spain's Azahara Munoz and South Koreans Amy Yang, Chella Choi and Ryu So-Yeon shared fifth on 203.