Mexico City: Christina Kim, who is seeking her first USLPGA win in almost a decade, posted a four-under 68 to take a five-shot lead into the final round of the Lorena Ochoa Invitational.
The 30-year-old American has one of the longest winless droughts on the tour -- her last victory came in 2005 at the Tournament of Champions.
Kim, who began the day just one shot ahead of Paula Creamer, finished 54 holes at 14-under-par 202.
"I`m just here to enjoy myself and really just go out and try and play some good golf and try to give the people of Mexico something to enjoy while we`re out here," Kim said.
China`s Feng Shanshan also shot a 68 at Club de Golf Mexico, which vaulted her into sole possession of second place at nine-under 207.
South Korea`s Ryu So-Yeon (69), Pornanong Phatlum (71) of Thailand and Spain`s Azahara Munoz (71) are all tied for third at eight under.
World number one Park In-Bee got into contention with a three-under 69 and she is alone in sixth at seven-under 209.
Kim was steady once again on Saturday as she began her day with two birdies on her first three holes.
A bogey at the par-three fifth hole was just Kim`s third of the week, and it was the first and only one she made in the third round.
"I`ve been really working hard on the game. My caddy and I have been using the mindset every day is Sunday because the previous six weeks in Asia, I`ve been putting up really good scores on Sunday," Kim said.
Defending champion Lexi Thompson fired a two-under 70, her third consecutive round in the 70s, and she is tied for 10th at four-under 212.
American Michelle Wie, the 2009 champion, shot a one-under 71 and she is tied for 12th at three-under 213.