Sports commentators have declared Roger Federer the Tiger Woods of tennis, but that title might better fit Maria Sharapova. Even before she won the U.S. Open, she was raking in $19 million a year from the likes of Nike and Motorola. Just imagine the endorsements she'll get now that she's won her second Grand Slam. "She's not a one-hit wonder anymore, living off her good looks," said Marc Ganis, president of Chicago-based SportsCorp. "She's a two-time champion. ... Marketers love her." Forbes listed her as the highest-paid female athlete, even before an estimated $33 million "lifetime" deal to use Prince rackets.