Hannah O'Sullivan routed two more opponents Thursday to advance to the U.S. Women's Amateur quarterfinals at Portland Golf Club
The 17-year-old O'Sullivan, from Chandler, Arizona, beat France's Justine Dreher 7 and 6 in the second round, and topped Jennifer Kupcho of Westminster, Colorado, 4 and 3 in the third.
On Wednesday in the first round of match play, O'Sullivan beat Haley Mills of Tyler, Texas, 7 and 6. O'Sullivan won the Symetra Tour's Gateway Classic in February in Mesa, Arizona, at 16 to become the youngest winner in the history of the professional circuit.
O'Sullivan will face Caroline Inglis of Eugene, Oregon. Inglis had 1-up victories over Annie Dulman of Palm Beach Gardens, Florida, and Lindsey McCurdy of Liberty Hill, Texas.