Mercedes dominated the practice sessions in Hamilton on Friday . Nico Rosberg finished ahead of rival Lewis Hamilton in both sessions . McLaren duo Jenson Button and Kevin Magnussen struggled with the Dane crashing out of FP2 . Sebastian Vettel was third on his debut for Ferrari in the second session .
Mercedes dominated the practice sessions in Melbourne on Friday . Nico Rosberg finished ahead of rival Lewis Hamilton in both sessions . McLaren duo Jenson Button and Kevin Magnussen struggled with the Dane crashing out of FP2 . Sebastian Vettel was third on his debut for Ferrari in the second session .