![Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/secondary/1687149.jpg?r=1547424413201)
Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk
![US Open Extreme Heat rule: What is it? Why has it been enforced? What can the players do? | Tennis | Sport | Express.co.uk US Open Extreme Heat rule: What is it? Why has it been enforced? What can the players do? | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/Novak-Djokovic-1010327.jpg?r=1536256703804)
US Open Extreme Heat rule: What is it? Why has it been enforced? What can the players do? | Tennis | Sport | Express.co.uk
![comscore Tennis logo Live Scores News Tournaments Players & Rankings Baseline Tickets Search Login Edit Profile Logout Live Scores News Tournaments Players & Rankings Baseline Tickets FORGE GO Advertising 6302 Results All video story album ... comscore Tennis logo Live Scores News Tournaments Players & Rankings Baseline Tickets Search Login Edit Profile Logout Live Scores News Tournaments Players & Rankings Baseline Tickets FORGE GO Advertising 6302 Results All video story album ...](https://images.tennis.com/image/private/t_1-1_768/f_auto/tenniscom-prd/oxju3btzeavduozuw63s.jpg)
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![Live Tennis on Twitter: "'The heat rule is in effect,' the umpire tells Caroline #Wozniacki & Sam #Stosur as they take the court for their R1 match on Arthur Ashe. https://t.co/x9T14A80AL" / Live Tennis on Twitter: "'The heat rule is in effect,' the umpire tells Caroline #Wozniacki & Sam #Stosur as they take the court for their R1 match on Arthur Ashe. https://t.co/x9T14A80AL" /](https://pbs.twimg.com/media/DlsvSMwXgAIA0px.jpg)
Live Tennis on Twitter: "'The heat rule is in effect,' the umpire tells Caroline #Wozniacki & Sam #Stosur as they take the court for their R1 match on Arthur Ashe. https://t.co/x9T14A80AL" /
![TENNIS a Twitter: "Wawrinka questions difference in heat rule for male and female players. From @Kamakshi_Tandon: http://t.co/sH7VbKXRYr http://t.co/wszNYufFuO" TENNIS a Twitter: "Wawrinka questions difference in heat rule for male and female players. From @Kamakshi_Tandon: http://t.co/sH7VbKXRYr http://t.co/wszNYufFuO"](https://pbs.twimg.com/media/COESU2cXAAARr71.jpg)
TENNIS a Twitter: "Wawrinka questions difference in heat rule for male and female players. From @Kamakshi_Tandon: http://t.co/sH7VbKXRYr http://t.co/wszNYufFuO"
![Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/72/590x/1071684_1.jpg?r=1547424412976)