Jannik Sinner of Italy plays a forehand return to Alexander Zverev of Germany during the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Asanka Brendon Ratnayake)

Jannik Sinner of Italy, left, is congratulated by Alexander Zverev of Germany following the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Vincent Thian)

Jannik Sinner of Italy holds the Norman Brookes Challenge Cup aloft after defeating Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Ng Han Guan)

Jannik Sinner of Italy drinks a glass champagne during a press conference after defeating Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 27, 2025. (AP Photo/Manish Swarup)

Alexander Zverev of Germany, right, turns to leave the stage after he congratulated Jannik Sinner of Italy following the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Vincent Thian)

Jannik Sinner of Italy celebrates after defeating Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Manish Swarup)

Jannik Sinner of Italy plays a backhand return to Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Manish Swarup)

Jannik Sinner of Italy celebrates after defeating Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025.(AP Photo/Mark Baker)

El italiano Jannik Sinner envía la pelota al alemán Alexander Zverev en la final masculina del Abierto de Australia en Melbourne, el domingo 26 de enero de 2025. (AP Foto/Vincent Thian)

Jannik Sinner of Italy holds the Norman Brookes Challenge Cup after defeating Alexander Zverev of Germany in the men's singles final at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 26, 2025. (AP Photo/Manish Swarup)

Jannik Sinner of Italy plays a backhand return to Ben Shelton of the U.S. during their semifinal match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 24, 2025. (AP Photo/Manish Swarup)