Tennis magazine selected Martina Navratilova as the greatest female tennis player for the years 1965 through 2005. Tennis historian and journalist Bud Collins has called Navratilova "arguably, the greatest player of all time." Billie Jean King said about Navratilova in 2006, "She's the greatest singles, doubles and mixed doubles player who's ever lived."
If time and finances permit, adult beginners should take a beginner tennis clinic and hit lots of balls, period. The clinic should be augmented by private lessons. After the basics are in place, find someone to hit with who can control the ball and see if he or she can practice with you. Take more clinics and hit balls … get exposure to hitting while you work on grip technique and footwork. Set a goal to get into the next level within 6-8 weeks.