South Koreans Hee Kyung Bae and Kyu Jung Baek both shot 68 to take a share of the lead after the third round of the LPGA's KEB-HanaBank Championship on Saturday.
Bae birdied five holes after the turn on the Ocean Course at the Sky72 Golf Club, while Baek had six birdies to go with two bogeys.
Both were at 5-under 211 overall, one stroke ahead of a large group that includes No. 2-ranked Inbee Park, Suzann Pettersen of Norway and Pornanong Phatlum of Thailand.
Park (68) could supplant Stacy Lewis at No. 1 if she wins the tournament. Lewis is not playing this week.
U.S. Women's Open champion Michelle Wie is just two strokes off the pace after sinking four birdies on the last five holes for a 67.