Lancaster, United States -World number one Nelly Korda's hopes of a third major title imploded with a spectacular first-round meltdown at the US Women's Open on Thursday (Friday in Manila) as former champion Yuka Saso overcame brutal conditions to take a one-shot lead.Korda arrived at Lancaster Country Club in Pennsylvania as a heavy favorite after winning six of her past seven starts, including the year's first major tournament at the Chevron Championship in April.But the 25-year-old American now faces an uphill struggle to even make the cut after carding a 10-over-par 80 -- the highest score of her LPGA Tour career -- during a hellish opening 18 holes.