The 37-year-old American achieved her victory over sister Venus in the final two years ago while eight weeks pregnant with her daughter Alexis Olympia.
While Nadal returns to the tour after nearly a two-month break at this week's Paris Masters, in-form Djokovic starts as the favourite to win the Masters 1000 title.
The Australian great was surfing with his son Josh near Stradbroke Island for over an hour when a wave caught him unaware, dumping him into a sandbank.
The Japan Meteorological Agency has labeled typhoon Trami "a very strong" storm carrying gusts of about 216 kilometers per hour and sustained winds of about 126 kilometers per hour near its centre.