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MELBOURNE, AUSTRALIA - FEBRUARY 01: Serena Williams of the United States holds the Daphne Akhurst Memorial Cup during a photocall at the Royal Exhibition Building in Carlton Gardens after winning the 2015 Australian Open on February 1, 2015 in Melbourne, Australia. (Photo by Scott Barbour/Getty Images)

MELBOURNE, AUSTRALIA - FEBRUARY 01:  Serena Williams of the United States holds the Daphne Akhurst Memorial Cup during a photocall at the Royal Exhibition Building in Carlton Gardens after winning the 2015 Australian Open on February 1, 2015 in Melbourne, Australia.  (Photo by Scott Barbour/Getty Images)