Novak Djokovic hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Alexander Zverev hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Novak Djokovic hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Alexander Zverev hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Novak Djokovic hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Alexander Zverev hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Novak Djokovic serves during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Alexander Zverev hits a return during the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Alexander Zverev(L) comforts Novak Djokovic after the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Alexander Zverev (L) comforts Novak Djokovic after the men's singles semifinals between Novak Djokovic of Serbia and Alexander Zverev of Germany at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Novak Djokovic(R) of Serbia and Alexander Zverev of Germany pose for photo before their men's singles semifinals at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Xinhua/Ma Ping)

Olivia Gadecki (L)/John Peers compete during the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Kimberly Birrell (L)/John-Patrick Smith compete during the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Olivia Gadecki (L)/John Peers (R) compete during the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Kimberly Birrell (R)/John-Patrick Smith react during the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Olivia Gadecki (1st L)/John Peers (3rd L) of Australia and their compatriots Kimberly Birrell (1st R)/John-Patrick Smith hug after their mixed doubles final at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Olivia Gadecki (L)/John Peers kiss the trophy after the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)

Olivia Gadecki (L)/John Peers pose for photos with the trophy after the mixed doubles final between Olivia Gadecki/John Peers of Australia and their compatriots Kimberly Birrell/John-Patrick Smith at Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2025. (Photo by Hu Jingchen/Xinhua)