Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup in the gardens of Government House the morning after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 30, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia poses with the Norman Brookes Challenge Cup in the gardens of Government House the morning after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 30, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia answers questions at a press conference following his win Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, early Monday, Jan. 30, 2023. (AP Photo/Dita Alangkara)

Novak Djokovic of Serbia holds the Norman Brookes Challenge Cup after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Asanka Brendon Ratnayake)

Novak Djokovic of Serbia kisses the Norman Brookes Challenge Cup after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Aaron Favila)

Novak Djokovic of Serbia celebrates in the stands with his support team after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Aaron Favila)

Novak Djokovic of Serbia, center, celebrates with his team including his mother, Dijana, second left, after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Asanka Brendon Ratnayake)

Novak Djokovic of Serbia, center, celebrates with his team including his mother, Dijana, left, after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Asanka Brendon Ratnayake)

Novak Djokovic of Serbia kisses the Norman Brookes Challenge Cup after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Asanka Brendon Ratnayake)

Novak Djokovic of Serbia celebrates after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia reacts as he holds the Norman Brookes Challenge Cup after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia celebrates after defeating Stefanos Tsitsipas of Greece in the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia plays a backhand return to Stefanos Tsitsipas of Greece during the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Ng Han Guan)

Novak Djokovic of Serbia falls while playing against Stefanos Tsitsipas of Greece during the men's singles final at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Ng Han Guan)

Stefanos Tsitsipas of Greece reacts as he changes ends during his men's singles final match against Novak Djokovic of Serbia at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Dita Alangkara)

Aryna Sabalenka of Belarus is taken by gondola at the Royal Botanical Gardens with the Daphne Akhurst Memorial Trophy the morning after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Aaron Favila)

Aryna Sabalenka of Belarus poses with the Daphne Akhurst Memorial Trophy in the Royal Botanical Gardens the morning after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Aaron Favila)

Aryna Sabalenka of Belarus reacts after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Asanka Brendon Ratnayake)

Rinky Hijikata, left, of Australia and compatriot Jason Kubler celebrate after defeating Hugo Nys of Monaco and Jan Zielinski of Poland in the men's doubles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 29, 2023. (AP Photo/Aaron Favila)

Aryna Sabalenka of Belarus carries the Daphne Akhurst Memorial Trophy as she leaves her press conference after defeating Elena Rybakina of Kazakhstan in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 28, 2023. (AP Photo/Dita Alangkara)