Ko holds on to top spot

Having gotten her 2015 campaign off to a red-hot start, Ko has fallen away slightly, coming home in 51st spot at the year's opening major, the ANA inspiration.

Ko missed last week's Lotte Championship in order to take a break ahead of the defence of her Swinging Skirts LPGA Classic title.

Inbee Park began last week ranked third in the world, but her second-place finish at the Lotte Championship was enough for her to edge by Stacy Lewis and up into second, but not enough to catch Ko.

Elsewhere in the top ten, So Yeon Ryu climbed to seventh, with Suzann Pettersen dropping to eighth.