Japan's Ai Miyazato retook the lead at the Founders Cup in Phoenix, firing a second-straight five-under-par 67.
Miyazato established a two-shot advantage on 19 under heading into the final round.
Her blemish-free round put her two clear of American Stacy Lewis, whose 66 saw her pass overnight leader Jee Young Lee as the South Korean could only manage a level-par 72 to sit 15 under.
Anna Nordqvist was leading the European challenge, sitting in a share of fourth on 13 under, while England's Jodi Ewart Shadoff was six under and compatriot Karen Stupples level par.
