Katherine Hull-Kirk, Amy Yang, Anna Nordqvist and KLPGA Tour player Ju Young Pak share a one-stroke lead Friday in the opening round of the LPGA KEB HanaBank Championship in Incheon, South Korea.
Each are 5-under after firing 67s on the Sky 72 Golf Club's Ocean Course.
Hull-Kirk, looking for her first win since 2010, birdied each of her first three holes and only putted 11 times in the first nine.
South Korean native Yang carded six birdies and one bogey in the opening round.
Nordqvist shot six birdies and one bogey as she is in search of her first victory since 2009.
Pak, the younger sister of LPGA Tour standout Hee Young Park, is also atop the leaderboard.
"When I was walking around the official golf course with my sister, she gave a lot of lessons and also how to address the certain play," she said. "That was a big help."
Caroline Hedwall is fifth, after a 68, heading into Saturday's second round.