Yahoo Sports reports: Yoon Ina conjured five birdies in a three-under par 69 on Friday to push her lead to five strokes in the Women's PGA Championship, where Nelly Korda was six adrift in her bid for a third straight major title.World number one Korda, seeking to become just the third LPGA player to win the first three majors of the season after her victories in the Chevron Championship and US Women's Open, posted a four-under par 68 and was tied on six-under 138 with South Korean Lee Dong-eun, who signed for a 69.