History-Making French Open
History was made this weekend at the French Open--one of the four major "Grand Slam" tennis tournaments. In women's singles, Li Na of China beat the defending champion, Francesca Shiavone of Italy, and became the first Asian-born player to win a Grand Slam singles title. For the men, Rafael Nadal of Spain beat Roger Federer of Switzerland. Twenty-five-year-old Nadal won his sixth French Open title, tying a record.) Federer still holds the all-time Grand Slam record with 16 career titles.) In his career, Federer has beaten Nadal 8 times, and Nadal has beaten Federer 17 times. What percent of matches against Federer has Nadal won?