Miyazato shot a two-under 69 to leave her eight-under with just one round remaining in the final women’s Major of the year.
The 72-hole tournament was cut to three rounds after torrential rain left the greens unplayable.
Ko shot four birdies on her way to a four-under 67 to leave her seven-under heading into Sunday’s crucial round, tied for second place with Norway’s Suzann Pettersen.
American Stacy Lewis, one of the pre-Major favourites, sits in fourth place after a four-under 67 left her two shots off the pace.
- Sports & Recreation