Serena Williams beats Maria Sharapova in the Australian Open final . The tennis star was a late replacement for injured sister Venus at Wimbledon last year and has won three titles since then. Williams wins a 19th major and sixth title at Melbourne Park .
Serena Williams beats Maria Sharapova in the Australian Open final . Williams prevails 6-3 7-6 to beat Sharapova for the 16th straight time . Williams wins a 19th major and sixth title at Melbourne Park .