Published: Oct 07, 2011 8:59 AM EDT
Updated: Oct 08, 2011 6:30 AM EDT

INCHEON, South Korea (AP) - Yani Tseng lived up to her top-ranked billing by shooting a seven-under 65 on Friday, taking the lead after the first round of the LPGA Hana Bank Championship.

The world No. 1 had ten birdies and three bogeys to take a one-stroke advantage over Chella Choi, who capitalized on early mild conditions at Sky 72 Golf Club to set the early pace at six-under.

Two-time defending champion Na Yeon Choi was in a tie for third place along with Sandra Gal of Germany at five-under.

American Paula Creamer and Swede Sophie Gustafson were part of a group of six players in a tie for fifth place at 4-under par, along with Koreans Meena Lee, Hee Young Park, Jimin Kang, and Mi Hyun Kim.