93. AO Round 3- was Sinner saved by the heat rule?

Was Sinner a couple of degrees away from being out of the Australian Open? Was Djokovic a couple of centimetres away from being defaulted and why was he simmering with frustration throughout his match? Is 2026 proving to be a true new start for Medvedev after an extremely poor 2025 as he wins from 2 sets to love down? Is there any cause for concern for Swiatek, Sabalenka, Gauff and other top seeds as they survive wob