Carlos Alcaraz celebrates after the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)

Novak Djokovic hits a return during the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)

Carlos Alcaraz hits a return during the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)

Novak Djokovic greets Carlos Alcaraz (R) after the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)

Novak Djokovic hits a return during the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)

Novak Djokovic greets spectators after the men's singles semifinal match between Novak Djokovic of Serbia and Carlos Alcaraz of Spain at the 2025 US Open tennis championships in New York, the United States, Sept. 5, 2025. (Xinhua/Li Rui)