While the shock loss of Charlie Whiting on Thursday cast an enormous shadow over those present at the Albert Park circuit, on Friday business continued exactly as he would have wanted - with track action underway and an intriguing pair of practice sessions taking place.
Mercedes turned an apparently questionable pre-season into two sessions topped. But is it the de facto pacesetter? There was also a scare for the new Red Bull-Honda relationship, Toro Rosso's Alex Albon started his F1 career in messy fashion and the Williams team ended up even further off the pace than expected.
Compiled by our team of dedicated reporters on the ground in Melbourne, here are the 10 things learned from the opening round of the Formula 1 season so far.