Martina Navratilova: 18 titles
3 Australian Open, 2 Roland Garros, 9 Wimbledon and 4 US Open. Czech by birth, although he was also a US citizen. Navratilova was one of the first great icons of women's tennis, whose figure has influenced and transcended to this day. Along with Margaret Court and Doris Hart, she is one of only three tennis players to have conquered all the Grand Slams in singles, doubles and mixed doubles. He was the Prince of Asturias Award in 1994.