Jannik Sinner, left, of Italy is congratulated by Holger Rune of Denmark following their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025.(AP Photo/Asanka Brendon Ratnayake)

Jannik Sinner of Italy celebrates after defeating Holger Rune of Denmark in their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025.(AP Photo/Asanka Brendon Ratnayake)

Madison Keys of the U.S. celebrates after defeating Elena Rybakina of Kazakhstan in their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Manish Swarup)

Holger Rune of Denmark receives treatment during his fourth round match against Jannik Sinner of Italy at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Asanka Brendon Ratnayake)

Jannik Sinner of Italy gestures as he talks with medical staff during his fourth round match against Holger Rune of Denmark at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Asanka Brendon Ratnayake)

Jannik Sinner of Italy walks back onto Rod Laver Arena following an injury timeout during his fourth round match against Holger Rune of Denmark at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Asanka Brendon Ratnayake)

Jannik Sinner of Italy reacts during his fourth round match against Holger Rune of Denmark at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Vincent Thian)

Holger Rune of Denmark plays a backhand return to Jannik Sinner of Italy during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2025. (AP Photo/Vincent Thian)