Alexander Zverev of Germany plays a backhand return to Tommy Paul of the U.S. during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2025. (AP Photo/Vincent Thian)

Novak Djokovic of Serbia reacts during his quarterfinal match against Carlos Alcaraz of Spain at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2025. (AP Photo/Asanka Brendon Ratnayake)

Ben Shelton of the U.S. celebrates after defeating Lorenzo Sonego of Italy in their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2025. (AP Photo/Manish Swarup)

Jannik Sinner of Italy plays a backhand return to Alex de Minaur of Australia during their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 22, 2025. (AP Photo/Asanka Brendon Ratnayake)

Novak Djokovic of Serbia celebrates with coach Andy Murry, right, after defeating Carlos Alcaraz of Spain in their quarterfinal match at the Australian Open tennis championship in Melbourne, Australia, early Wednesday, Jan. 22, 2025. (AP Photo/Asanka Brendon Ratnayake)