South Korea's Sei Young Kim shot a 5-under 66 on Saturday to remain in the lead after three rounds of the Marathon Classic in Sylvania, Ohio.
Kim, who is at 16-under 197, is one shot ahead of charging Lexi Thompson, who fired a 65 in her third trip around Highland Meadows Golf Club in the Toledo-area event. Thompson ended her round with an eagle.
South Korea's Jeongeun Lee6 is alone in third, four shots off the pace, after shooting 69 during the windy conditions.
Spain's Carlota Ciganda (68), Jennifer Kupcho (69) and Stacy Lewis (69) are another shot back in a tie for fourth.
Thailand's Pavarisa Yoktuan (66) and Canada's Brooke Henderson (67) are tied for tied for seventh at 204, seven shots behind Kim.
Kim produced seven birdies and two bogeys during her round. She posted four birdies in a six-hole span from Nos. 12-17 to open a cushion that proved to be needed due to Thompson's finish.
Kim is looking for her second win of the season and ninth LPGA victory of her career.
"Oh, I'm very confident right now," Kim said after the round. "Just, yeah, play the same as last three days. Yeah, last three days and just whatever happens, just let it go. Just do my best."
Thompson began her round with a bogey and then birdied five of the next eight holes. Her back nine consisted of eight straight pars before an energizing finish when she recorded the eagle on the par-5, 18th hole.
"I finally got a drive in that fairway," Thompson said afterward. "I've been hitting great drives but going through in that bunker, which I didn't know what was reachable. So I got a drive left of it today and had 177 (yards to the) hole and the wind started to gust up so it was taking forever to hit that golf shot, which I hate.
"I ended up just hitting a 6-iron and just trying to flight it as best I could and carry the bunker by a few yards, and ended up having 20, 25 feet (for the putt) and made it."
Thompson will be aiming for her second victory in the past five weeks and 12th of her LPGA career on Sunday when she is paired with Kim.
"I'm very excited to play with Lexi Thompson," Kim said. "She's a really long driver and great player."
Lee6, the U.S. Women's Open champion, had four birdies and two bogeys. Two of the birdies came over the final three holes.
"Today my tee shot was not very good, especially my iron shots," Lee6 said through a translator. "It was so hard to control my shots, and so, yeah, there weren't a lot of birdies today."
Ciganda made five birdies (including the final two holes) and two bogeys, Kupcho had six birdies and four bogeys, while Lewis collected five birdies and three bogeys.
Lewis waited out the wind on multiple occasions before hitting shots.
"I don't think I've ever played this tournament with this much wind before. It's kind of strange here," Lewis said. "Figuring out do we trust what the weatherman says or do we trust what it feels like. That's kind of what we are trying to figure out on the golf course. I don't know if we ever really did, but you just do the best you can."
Defending champion Jasmine Suwannapura of Thailand is tied for 50th at 2-under 211 after shooting 69.
--Field Level Media