Australian Open introduces new heat stress scale, allowing 10-minute breaks in men's matches - ABC News
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Australian Open heat rule: What is it and when can matches get SUSPENDED | Tennis | Sport | Express.co.uk
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ZooTennis: Discussing the ITF's New Junior Heat Rule; Navarro Wins Grade 2 Title in Montreal; Nakashima Reaches Semis at Laguna Niguel Futures; Oracle Masters Update
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US Open Extreme Heat rule: What is it? Why has it been enforced? What can the players do? | Tennis | Sport | Express.co.uk
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