Tennis has been for years and years ruled by a hierarchy of dinosaurian, who decide what the rules are and are not. The game has evolved from being a sport played by a restricted group of snooty, snobbish "blue blood" high society to a popular middle class sport. The grip of the dinosaurian in the professional field is more visible at the four major grand slams, Australian Open, French Open, Wimbledon and US Open as well as Davis and Fed Cups. The ATP and WTA constantly try to bring innovation and adapt to present times while the old drudges stubbornly drag their feet.