Martina Hingis was the youngest at 16 years 4 months in 1997.
Tracy Austin was the youngest female to win the US Open at the age of 16 years 9 months in 1979.
Pauline Spencer-Parsons in 1927 ?
Jelena Ostapenko is the youngest women to win a grand slam at the 2017 French Open.
Men - Michael ChangWomen - Monica Seles
Well, I think they get in by filling in a form their coaches give them....as easy as THAT!