Chevron champ Saigo takes three-shot US Women's Open lead
Japan's Saigo, who won a five-way playoff to lift her first major trophy at the Chevron Championship, shrugged off a spectacular piece of bad luck to build a 36-hole total of 136 at Erin Hills.
Korda posted a five-under-par 67 to headline a group of six players on 139.
Saigo, 23, last year's LPGA Rookie of the Year, said her victory at the Chevron in April had given her new confidence but hadn't changed her fundamental approach.
"I think that I was able to be more confident about my judgments that I make," she said.