MELBOURNE, AUSTRALIA - JANUARY 16: Caroline Wozniacki of Denmark in action against Johanna Larsson (not seen) of Sweden during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Wozniacki won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Caroline Wozniacki (R) of Denmark in action against Johanna Larsson (L) of Sweden during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Wozniacki won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Caroline Wozniacki of Denmark in action against Johanna Larsson (not seen) of Sweden during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Wozniacki won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Caroline Wozniacki of Denmark in action against Johanna Larsson (not seen) of Sweden during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Wozniacki won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Gael Monfils of France in action against Taylor Fritz (not seen) of USA during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Fritz won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Gael Monfils of France in action against Taylor Fritz (not seen) of USA during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Fritz won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Taylor Fritz of USA in action against Gael Monfils (not seen) of France during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Fritz won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Taylor Fritz of USA in action against Gael Monfils (not seen) of France during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Fritz won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Mackenzie McDonald of USA in action against Marin Cilic (not seen) of Croatia during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Cilic won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Marin Cilic of Croatia in action against Mackenzie McDonald (not seen) of USA during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Cilic won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Marin Cilic of Croatia in action against Mackenzie McDonald (not seen) of USA during Australian Open 2019 Men's Singles match in Melbourne, Australia on January 16, 2019. Cilic won the match with 3-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Yafan Wang of China in action against Ashleigh Barty (not seen) of Australia during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Barty won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Sloane Stephens of USA in action against Timea Babos (not seen) of Hungary during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Stephens won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Sloane Stephens of USA in action against Timea Babos (not seen) of Hungary during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Stephens won the match with 2-0. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Anastasia Pavlyuchenkova of Russia in action against Kiki Bertens (not seen) of Netherlands during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Pavlyuchenkova won the match with 2-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Anastasia Pavlyuchenkova of Russia in action against Kiki Bertens (not seen) of Netherlands during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Pavlyuchenkova won the match with 2-1. ( Recep Şakar - Anadolu Agency )
MELBOURNE, AUSTRALIA - JANUARY 16: Kiki Bertens of Netherlands in action against Anastasia Pavlyuchenkova (not seen) of Russia during Australian Open 2019 Women's Singles match in Melbourne, Australia on January 16, 2019. Pavlyuchenkova won the match with 2-1. ( Recep Şakar - Anadolu Agency )