Jannik Sinner of Italy shakes hands with Marcos Giron of the U.S. following their third round match at the Australian Open tennis championship in Melbourne, Australia.

Emma Raducanu of Britain congratulates Iga Swiatek, right, of Poland following their third round match at the Australian Open tennis championship in Melbourne, Australia.

Iga Swiatek of Poland signs a screen on a television camera after defeating Emma Raducanu of Britain in their third round match at the Australian Open tennis championship in Melbourne, Australia.

Ons Jabeur of Tunisia gestures during her third round match against Emma Navarro of the U.S. at the Australian Open tennis championship in Melbourne, Australia.

Emma Navarro of the U.S. plays a backhand return to Ons Jabeur of Tunisia during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Iga Swiatek of Poland plays a forehand return to Emma Raducanu of Britain during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Jack Draper of Britain celebrates after defeating Aleksandar Vukic of Australia during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Alex Michelsen of the U.S. plays a backhand return to Karen Khachanov of Russia during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Karen Khachanov of Russia plays a backhand return to Alex Michelsen of the U.S. during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Jannik Sinner of Italy waves after defeating Marcos Giron of the U.S. during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Marcos Giron of the U.S. plays a backhand return to Jannik Sinner of Italy during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Jannik Sinner of Italy plays a backhand return to Marcos Giron of the U.S. during their third round match at the Australian Open tennis championship in Melbourne, Australia.

Ben Shelton of the U.S. reacts during his third round match again Lorenzo Musetti of Italy at the Australian Open tennis championship in Melbourne, Australia.

Learner Tien of the U.S. celebrates after defeating Corentin Moutet of France in their third round match at the Australian Open tennis championship in Melbourne, Australia.

Gael Monfils, right, of France is congratulated by Taylor Fritz of the U.S. following their third round match at the Australian Open tennis championship in Melbourne, Australia.

Gael Monfils of France celebrates after defeating Taylor Fritz of the U.S. in their third round match at the Australian Open tennis championship in Melbourne, Australia.

Taylor Fritz of the U.S. plays a forehand return to Gael Monfils of France during their third round match at the Australian Open tennis championship in Melbourne, Australia.