Stefanos Tsitsipas of Greece reacts during the men's singles match against Alexander Shevchenko of Kazakhstan in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Maria Sakkari of Greece serves during the women's singles match against Elena Rybakina of Kazakhstan in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Alexander Shevchenko of Kazakhstan celebrates during the men's singles match against Stefanos Tsitsipas of Greece in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Elena Rybakina of Kazakhstan (L) and Maria Sakkari of Greece pose for photo before the women's singles match in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Stefanos Tsitsipas of Greece hits a return during the men's singles match against Alexander Shevchenko of Kazakhstan in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Alexander Shevchenko of Kazakhstan hits a return during the men's singles match against Stefanos Tsitsipas of Greece in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Maria Sakkari of Greece serves during the women's singles match against Elena Rybakina of Kazakhstan in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Stefanos Tsitsipas of Greece hits a return during the men's singles match against Alexander Shevchenko of Kazakhstan in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
Alexander Shevchenko of Kazakhstan hits a return during the men's singles match against Stefanos Tsitsipas of Greece in the Group C round robin match between Greece and Kazakhstan at the 2025 United Cup tennis tournament in Perth, Australia, Dec. 30, 2024. (Photo by Zhou Dan/Xinhua)
