The 17-year-old Pressel defeated Aimee Neff, 6 and 4, in the morning session and then disposed of Corrine Carr, 7 and 5 in the second round in the afternoon. Pressel won the final five holes of the match versus Carr and will next face Juliana Murcia Ortiz of Colombia.
Medalist Taylore Karle of Scottsdale, Ariz, who finished with a stroke record 12-under-par 130 on Tuesday, beat Melissa Mabanta, 5 and 4, in the morning on Wednesday. However, the 15-year-old Karle then fell to Stephanie Connelly, 2 and 1, in the afternoon.
In-Bee Park, the 2002 Girls' Junior champion, eliminated Stephanie Kono, 3 and 2.
'I have to say to myself that every match is the final,' said Park, who is playing in her fifth Girls' Junior. 'It's the hardest tournament to win. I've been playing this tournament five years now. I'm pretty used to 36 holes a day.'
Also advancing to the third round was 2004 U.S. Women's Amateur Public Links champion Ya-Ni Tseng of Chinese Taipei.
This week's event, which has proven to be a springboard for success for LPGA talent over the years, is taking place at the 6,348-yard, par-71 BanBury Golf Club.
The field is now down to 16 players for match play. The third and quarterfinal rounds will be played Thursday, the semifinal matches are on Friday, and the 18-hole championship final is scheduled for Saturday.
The U.S. Girls' Junior was established in 1949 and is open to any female golfer who has not reached her 18th birthday by the close of the competition and has a USGA Handicap Index that does not exceed 18.4. The Girls' Junior is one of 13 national championships conducted annually by the USGA, 10 of which are strictly for amateurs.