Hannah O'Sullivan and Sierra Brooks advanced to the U.S. Women's Amateur final Saturday at Portland Golf Club.

The 17-year-old O'Sullivan, from Chandler, Arizona, rallied to beat 17-year-old Mathilda Cappeliez of France, 1 up, and the 17-year-old Brooks, from Sorrento, Florida, topped 18-year-old UCLA freshman Bethany Wu of Diamond Bar, California.

Three holes down after eight, O'Sullivan won Nos. 9, 10, 12 and 14 to take a 1-up lead. Cappeliez tied it with a par on the par-4 16th, and O'Sullivan took the par-3 17th with a birdie won with a halve on the par-5 18th.

O'Sullivan won the Symetra Tour's Gateway Classic in February at 16 to become the youngest winner in the history of the professional circuit. In May, she teamed with Robynn Ree to finish second in the inaugural U.S. Women's Amateur Four-Ball at Bandon Dunes.