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Daniil Medvedev wipes his face using his shirt.

A tennis fan sits in stands with a jacket over his head, protecting himself from the sun.

Carolyn Broderick smiles at the camera.



But scientists who research how heat affects the human body are more interested in other weather measurements.

Professor Ollie Jay in his laboratory at University of Sydney.

Karolína Muchová wipes her forehead with her wrist band

An infographic showing all the features of the EMU.

A dashboard view, showing a one to five scale and lots of different environmental values.

A rating from one to five which says: 3. apply cooling strategies, 4. extended break, 5. suspension of play

Novak Djokovic wipes sweat on his shirt

An Australian Open spectator cools themselves with a misting fan.

The monitoring system is positioned next to a tennis court.

Maddison Inglis holds an ice towel against her neck.

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