World number one Yani Tseng is missing this week but the remaining members of the top five are, namely Stacy Lewis, Na Yeon Choi, Shanshan Feng and Suzann Pettersen are.
With only two weeks to the US Women's Open, this event and next week's Walmart Arkansas Championship will provide a worthwhile guide to the chances of many at the game's biggest event in Kohler, Wisconsin.
Australians in the event are Karrie Webb, Katherine Hull, Wendy Doolan and Sarah-Jane Smith.
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