Tennis legend Billie Jean King is a guest on tonight's "Piers Morgan Tonight," and talks about today's women's tennis stars. "This generation is so much better," she tells Piers Morgan. "Serena, she could have been the greatest player of all time, if she would play consistently. But she has so many other things which she loves to do."
Also on tonight's show – golf's rising star Rory McIlroy, fresh off his U.S. Open victory.