Former women's world number one Naomi Osaka donned a jellyfish-inspired outfit and carried an umbrella as she stepped onto the court during the first two rounds of the Grand Slam in Melbourne.

The ambitions of Carlos Alcaraz and Iga Swiatek to complete their collections, or Novak Djokovic's goal of claiming a record 25 Grand Slam titles, could all become reality during two weeks of play in Melbourne.

Thirty-eight-year-old Novak Djokovic is predicted to retire if he secures his 25th Grand Slam title in Melbourne next month.