Hannah O'Sullivan made a 7-foot par putt on the 18th hole to beat SMU junior Lindsey McCurdy 1 up Friday in the U.S. Women's Amateur quarterfinals.
Two holes down after 10 holes at Portland Golf Club, the 17-year-old O'Sullivan, from Chandler, Arizona, won the next four holes — making three pars and a birdie on the par-4 14th — to take a 2-up lead.
McCurdy, from Liberty Hill, Texas, won the par-4 16th with a par to pull within one, and halved the par-3 17th to keep the match alive. O'Sullivan holed the winning putt after running her 25-foot birdie attempt past the hole on the par-5 18th.
O'Sullivan, also a semifinalist last year, will face 17-year-old Mathilda Cappeliez, a 5-and-4 winner over Tennessee sophomore Anna Newell of Tampa, Florida.
In the other quarterfinals, 17-year-old Sierra Brooks of Sorrento, Florida, beat UCLA junior Bronte Law of England 5 and 3; and 18-year-old UCLA freshman Bethany Wu of Diamond Bar, California, topped 16-year-old Mika Liu of Los Angeles 5 and 4.