Who was the youngest to ever play in the U.S Open for tennis?

Who was the youngest person to ever play in the tennis U.S. Open? What age and if you can, please also include a link for his / her game

eliteresumeservices:
for females tracey austin 16
for male pete sampras 19
http://2006.usopen.org/en_US/about/history/rec_age.html

tennisrox94:
1985 - Mary Joe Fernandez, at the age of 14 years and eight
days, becomes the youngest player to win a match at the U.S.
Open when she defeats Sara Gomer 6-1, 6-4 in the first round.
http://sportsillustrated.cnn.com/tennis/1998/usopen/news/1998/08/28/stats/thisday.html