Williams has won 35 of her past 36 matches, including titles at Wimbledon, the Olympics, the U.S. Open, the season-ending WTA championships and now the first event of 2013.
Defending champion Andy Murray advanced to the men's final when fifth-seeded Kei Nishikori retired with an injured left knee while trailing 6-4, 2-0 in their semifinal earlier Saturday.
The Olympic and U.S. Open champion will next meet 21-year-old Grigor Dimitrov, who is starting to live up to his billing as a star-in-the-making by reaching his first ATP Tour final with a 6-3, 5-7, 7-6 (5) victory over Marcos Baghdatis.
Press; By JOHN PYE]
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