Relief was at hand, however, with a cool change blowing over the city and the temperature expected to fall back below 30 by the evening.
Former champion Naomi Osaka is wearing a different facemask for each of her matches at the US Open this year.
Local hope Nick Kyrgios has been elevated to the Rod Laver Arena for his meeting with childhood hero Jo-Wilfried Tsonga at the Australian Open on Friday, when Melbourne Park is again expected to swelter.
Images from Day 7 of the 2021 French Open at Roland Garros in Paris on Saturday.
Images from the Australian Open matches played at Melbourne Park on Wednesday.