The rivalry with Maria Sharapova -- Between points, Serena Williams stood motionless behind the baseline with her back to the net, as if trying to match -- or mimic -- the methodical ritual of her opponent, Maria Sharapova. They took turns waiting on each other, the pace of play plodding, but there was no delaying the inevitable. Williams beat Sharapova for the 15th consecutive time y, rallying in both sets to win 6-4, 6-3 in the Sony Open semifinals. "I have always felt when I'm playing at my best, then it's hard for people to beat me," Williams said. Williams improved to 16-2 against her favorite foil. Sharapova hasn't beaten Williams since 2004.