Angela Stanford scored the upset of the day during second round play at the LPGA Match Play in Mexico City.
Stanford advanced to the round of 16 with a 2-and-1 upset of Inbee Park, one of the four top seeds in the event.
World No. 1 Lydia Ko advanced with a 1-up win over Jennifer Song while Ariya won the battle between the sisters Jutanugarn, beating older sibling Moriya, 2-up.
Michelle Wie continued her solid play with a 3-and-2 victory over Laura Gonzalez Escallon of Spain.
In mild upsets, Pernilla Lindberg took out Brittany Lang, 4-and-3 while Sandra Gal defeated Sung Hyun Park, 2-and-1.
Cristie Kerr advanced with an easy 4-and-3 victory over Jenny Shin.
