Mercedes dominated the practice sessions in Melbourne on Friday . The German team had a strong start to their pre-season testing at Sepang with Lewis Hamilton setting fastest time of 1m24.832s and Nico Rosberg 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 .