Australian Minjee Lee and American Mina Harigae are tied for the lead at nine under after two rounds of the U.S. Women's Open played at Pine Needles.
Harigae was tied for the lead after Thursday's first round, and followed it up her 64 with a solid 69, while Lee posted a 67 on Thursday and then followed it with Friday's second-best round of the day, shooting a 66.
The actual round of the day went to South Korea's Choi Hye-jin, who shot a seven-under 64 after entering the day at even par to sit in a tie for third heading into the weekend.
She is tied two shots back from the lead at seven under with Sweden's Anna Nordqvist, one shot ahead of fellow Swede, amateur Ingrid Lindblad, who posted a one under score on Friday after setting the U.S. Women's Open record for lowest score by an amateur with her opening round 65.
Lindblad is tied with world number one Ko Jin-young at six under, with South Korea's Kim Sei-young and Thailand's Moriya Jatanugarn one stroke back at five under.
Rounding out the top-10 are the American trio of Ryann O'Toole, Megan Khang and Andrea Lee, along with England's Bronte Law and South Korea's Park Sung-hyun, tied for ninth at four under.