Defending champion Lorena Ochoa shot a bogey-free 8-under 65 on Thursday to take a one-stroke lead over Michelle Wie and Na Yeon Choi after the first round of the LPGA Tour's Corona Championship in Morelia, Mexico.
Ochoa, the top-ranked Mexican star, also won the 2006 tournament at Tres Marias.
Wie, who started on No. 10, eagled the par-5 fifth and birdied three of her final four holes. After opening the season with a second-place finish at Turtle Bay, she tied for 57th in Phoenix and tied for 67th in the Kraft Nabisco -- shooting 71-81-81-71.
South Korea's Charlie Wi took advantage of soft early morning conditions to shoot a bogey-free 6-under 66 and take a one-stroke lead after the first round of the Zurich Classic in Avondale, La.
Jay Williamson, Nathan Green, Parker McLachlin, Charles Warren, John Merrick and Eric Axley opened with 67s.
-- The Associated Press