Novak Djokovic of Serbia serves to Jiri Lehecka of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Jiri Lehecka of the Czech Republic hits a return to Novak Djokovic of Serbia during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Novak Djokovic of Serbia hits a return to Jiri Lehecka of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Novak Djokovic (front) of Serbia serves to Jiri Lehecka of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Novak Djokovic of Serbia reacts as he competes against Jiri Lehecka of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Novak Djokovic of Serbia reacts as he competes against Jiri Lehecka of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Novak Djokovic (L) of Serbia poses with Jiri Lehecka (R) of the Czech Republic before the Group E match between the Czech Republic and Serbia at the 2024 United Cup tennis tournament in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Marketa Vondrousova of the Czech Republic competes against Olga Danilovic of Serbia during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Olga Danilovic of Serbia competes against Marketa Vondrousova of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Marketa Vondrousova of the Czech Republic competes against Olga Danilovic of Serbia during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Olga Danilovic of Serbia competes against Marketa Vondrousova of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Marketa Vondrousova of the Czech Republic competes against Olga Danilovic of Serbia during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Olga Danilovic of Serbia competes against Marketa Vondrousova of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Olga Danilovic of Serbia competes against Marketa Vondrousova of the Czech Republic during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
Marketa Vondrousova (R) of the Czech Republic poses with Olga Danilovic (L) of Serbia during the Group E match between the Czech Republic and Serbia at the 2024 United Cup in Perth, Australia, Jan. 2, 2024. (Photo by Zhou Dan/Xinhua)
