As temperatures soared past 35°C (95°F) in Melbourne, the combination of heat and humidity forced the Australian Open to invoke its Extreme Heat Policy, which meant cancelling the start of any new matches on outer courts. (Matches already underway would be played to their conclusion.) The two main show courts each feature a retractable roof, which meant I got to watch the roof of Rod Laver Arena slowly close over the course of about fifteen minutes; I was amazed at how quiet the process was. Once finished, the atmosphere of the court was entirely transformed for the Nadal and Clijsters matches that followed. It felt like an indoor tournament, as the lighting and even the reverberating sounds of the match were significantly different. It didn't seem to matter at all to the top players, though, as both Nadal and Clijsters cruised in straight sets--the latter with a double bagel! As a spectator, it was surely more enjoyable to watch the tennis from air conditioned comfort.