World No. 2 Sung Hyun Park of South Korea fired an 8-under-par round of 63 on Saturday to join Spain's Carlota Ciganda atop the leaderboard through two rounds of the Walmart NW Arkansas Championship in Rogers, Ark.

Park and Ciganda sit at 13-under 129 entering the final round, two strokes ahead of a seven-player cluster that includes world No. 1 Jin Young Ko and first-round leader and No. 9 Inbee Park, both of South Korea.

Thailand's Jasmine Suwannapura (65) and South Africa's Ashleigh Buhai (66) are tied for 10th at 10 under, with four players another stroke back and a group of 10 players at 8 under.

Sung Hyun Park opened her day on fire, birdieing the first two holes and adding two more at Nos. 4 and 6. On the back nine, she birdied the 10th, 11th and 15th before dropping a shot at 16. But she quickly rebounded with a birdie-birdie finish.

"I wasn't really worried when I made that bogey," Park said through a translator after her round. "I like 17th and the 18th holes, and I made a birdie on the last hole yesterday, too, so I knew that I wouldn't have to worry after that bogey."

Ciganda opened with a bang at the 320-yard par-4 first hole, holing out with a short wedge from the rough on her approach for an eagle. She added birdies at Nos. 5 and 7 before a quiet back nine, but birdied the 18th to cap a bogey-free round of 66.

"There's still lots of golf to play tomorrow, and it can go very low here," Ciganda said. "I think it's nice to be up there, but I think there are some great players here. I'm happy with the way I played."

Inbee Park cooled off after a scorching 62 on Friday, but she recovered from back-to-back bogeys at 10 and 11 with birdies at 16 and 18, capping a round of 69.

Ko also birdied two of her last three holes, shooting a bogey-free 66 after starting the day on the back nine.

American Danielle Kang is among the others tied for third after matching Sung Hyun Park for the low round of the day. She shot 4-under 32 on the front nine, added two more birdies on the back and closed with an eagle at the par-5 18th.

"To be honest, the golf course is very scoreable, so all I need to do is keep giving myself opportunities, and that's what I did today," Kang said afterward. "I missed a few putts, but I made a few."

Hyo Joo Kim of South Korea, playing with Kang, shot 64 to join the group at 11 under, which also includes America's Brittany Altomare (65), Venezuela's Daniela Darquea (65) and Sweden's Linnea Strom (65).

Defending champion Nasa Hataoka of Japan shot 72 and is tied for 46th at 5 under.