Martina Navratilova

Europe has produced many a women's tennis champion over the past 60 years, but none has challenged orthodoxy quite as vigorously as Martina Navratilova, both on and off the court. She was the left-hander with a serve-and-volley game in a world dominated by right-handers who preferred to stick to the baseline.

She burst onto the international scene as a lone European taking on American champions like Chris Evert, but by the time she bowed out of professional singles' tournaments, after an unmatched 168 singles titles, she was the lone American taking on Europeans such as Steffi...