GLEN COVE, N.Y. (AP) -- Canadian teen Brooke Mackenzie Henderson advanced to the U.S. Women's Amateur quarterfinals Thursday, winning two matches at Nassau Country Club.
The 16-year-old Henderson, the low amateur in the U.S. Women's Open, beat Ember Schuldt of Sterling, Illinois 4 and 3 in the morning, and topped Dylan Kim of Plano, Texas, 3 and 2 in the third round.
''It was a little up and down,'' said Henderson, second in the world amateur ranking. ''We both weren't playing great, but we sort of fought it out until the end.''
Henderson, from Smith Falls, Ontario, is trying to become the first Canadian winner since Cathy Sherk in 1978.
Henderson will face Alison Lee of Valencia, California, on Friday. Lee edged Eimi Koga of Honolulu in 20 holes in the third round.
In the other upper-bracket quarterfinal, Hannah O'Sullivan of Paradise Valley, Arizona, will play Grace Na of Alameda, California. In the third round, O'Sullivan edged Canada's Augusta James in 20 holes, and Na beat Lauren Kim of Los Altos, California, 2 up.
In the lower bracket, Australia's Su-Hyun Oh will play Kristen Gillman of Austin, Texas; and Andrea Lee of Hermosa Beach, California, will face South Korea's 14-year-old Eunjeong Seong.
In the third round, Oh routed defending champion Emma Talley of Princeton, Kentucky, 9 and 8; Gillman beat Casey Danielson of Osceola, Wisconsin, 5 and 3; Andrea Lee topped Jessica Porvasnik of Hinckley, Ohio, 4 and 2; and Seong beat New Zealand's Liv Cheng in 19 holes.
''Emma didn't play her best, but she also had some really bad breaks in the middle,'' Oh said. ''In the end, it all just went my way.''
Oh's margin was the biggest since 2005 when Angela Park beat Jennifer Ackerson, also 9 and 8.
''Sometimes you run into someone that's playing really well,'' said Talley, the Alabama player who made the deciding putt in the Curtis Cup. ''We started out basically the same. She just made her putts and I didn't.''