Angelique Kerber of Germany in action during her third round match against Maria Sharapova of Russia at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 20 January 2018. EPA-EFE/JOE CASTRO
Naomi Osaka of Japan in action against Ashleigh Barty of Australia during round three on day six of the Australian Open tennis tournament, in Melbourne, Victoria, Australia, 20 January 2018. EPA-EFE/LUKAS COCH
Novak Djokovic of Serbia stretches during his third round match against Albert Ramos-Vinolas of Spain at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 20 January 2018. EPA-EFE/MARK CRISTINO
Lauren Davis of the USA reacts during round three against Simona Halep of Romania on day six of the Australian Open tennis tournament, in Melbourne, Victoria, Australia, 20 January 2018. EPA-EFE/TRACEY NEARMY
Chung Hyeon of South Korea in action during his third round match against Alexander Zverev of Germany at the Australian Open Grand Slam tennis tournament in Melbourne, Australia, 20 January 2018. EPA-EFE/MAST IRHAM
