Supreme Serena targeting calendar Slam to equal achievements of Graf
All smiles: Serena Williams
Serena Williams sent a Twitter message on Saturday night to her old friend and training partner Andy Roddick. "I hear you said I'm already thinking about the US Open five minutes ago? Ummm Andy, you are 20 minutes late."
From a woman who has now won four consecutive majors, this was an ominous message to the rest of the tour.
