The 24-year-old Park won the Kraft Nabisco and LPGA Championship for her first two major titles of the year. Up next is the Women's British Open at St. Andrews on Aug. 1-4.
The Evian Championship is Sept. 12-15. Park won the French event last year before it became a major championship.
Park contemplated the current definition of a Grand Slam.
"So I think the British Open is one I have to win," she said. "So it would be great if I could win five, but I still think four means a Grand Slam."
Laughing, she added: "I think four out of five is very big."
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