Ko, Woad share lead at LPGA season opener
Ko rattled off a hat-trick of birdies on the back nine in a bogey-free round that left her on eight-under after 36 holes at Lake Nona Country Club in Orlando, Florida.
The 28-year-old three-time major winner was joined at the top of the leaderboard by England's Lottie Woad, who followed up her opening 67 with a three-under-par 69.
Ko said she had carried momentum from a solid opening round on Thursday into the second round.
"I felt like I played pretty solid overall," Ko said. "I surprised myself a little bit yesterday.