MEXICO CITY (AP) " Ariya Jutanugarn won a sister showdown Friday in the Lorena Ochoa Match Play, and Lydia Ko, Michelle Wie and Cristie Kerr also advanced at Club de Golf Mexico.
The third-ranked Jutanugarn edged older sister Moriya 2 up in the second round.
She will face Pernilla Lindberg in the round of 16 in the event that switched from stroke to match play and moved from November to April.
Ko beat Jennifer Song 1 up to guarantee staying No. 1 in the world.
Wie topped Laura Gonzalez Escallon 3 and 2, and Kerr beat Jenny Shin 4 and 3. Kerr won three weeks ago in Hawaii and lost to Haru Nomura on Sunday on the sixth hole of a playoff in Texas.