Maria Sharapova hasn't win over Serena Williams since 2004 and she couldn't break that unpleasant trend yesterday.
Serena was just better in every aspect of the game: with serve, with winners, with unforced errors.
It will be unfair for Maria to tell that she hasn't tried - she did: she was pretty aggressive, played drop-shots and went to the net more often than usually. However nothing helped due to both errors in execution from Maria and stellar play of Williams. So she lost again.