World No. 1 Lorena Ochoa of Mexico and American Paula Creamer each fired a 66 on Saturday to lead eight qualifiers for yesterday's US$1 million LPGA Tour Championship showdown.
Ochoa had a bogey-free round of six under-par while Creamer followed an eagle at the 15th with her lone bogey to match Ochoa at the top after scores from the first two rounds had been wiped out.
Scores from Saturday will again be set aside, setting the stage for an 18-hole battle for the top prize in women's golf with only US$100,000 to the runner-up.
Joining Ochoa and Creamer in the last eight were Australian Karrie Webb on 68, American Cristie Kerr on 69, South Korean Sarah Lee and American Natalie Gulbis on 70 and playoff survivors Kim Mi-hyun of Korea and Christina Kim.
Gulbis made bogey at 13 to stand one-over with five to play but answered with birdies on 14, 15 and 17 to finish on 70 and grab a spot in the final eight without the added drama of a playoff.
US' Christina Kim, one-over with five holes to play, made birdies at 14 and 15, a bogey at 16, a birdie at 17 and a par at 18 to fight her way into what was a two-hole sudden death playoff fight among four women for two of yesterday's spots.
The Kims advanced after replaying the 17th and 18th holes while Gustafson and Castrale were eliminated.
US veteran Juli Inkster took a bogey at 16 and double bogey at 17 to finish on 72 and miss the playoff for the final-day fireworks.