A blockbuster match at the Australian Open is going the distance. A palpable stillness blankets Rod Laver Arena as beads of sweat gather on the athletes’ skin, cascading to the floor ahead of yet another arduous point. Under the scorching sun, beneath a stifling heat, a universal question lingers — how hot is too hot to continue?
This year, heat hasn’t been a major talking point: Novak Djokovic’s verbal spat with a spectator is about as hot as the tournament has been so far, with temperate conditions meaning that…
