Lewis Hamilton says that the first day of practice for the Australian Grand Prix was positive, despite missing out on a session due to a sensor calibration issue.
Hamilton stopped out on track on his installation lap in the first session but set the quickest time in the second of the day's 90 minute sessions.
"It really was a day of two halves today," he said.
"While it was disappointing to not get any track time this morning, these little hiccups are going to happen with the new cars and we'll have to get used to that. It felt like I was on the back foot from there but then we got up to pace quite quickly in P2 and found the balance relatively fast.
"I feel quite comfortable in the car so overall it's a positive start but we need to look at the data now and understand where we are. We got a nice foundation for the weekend in the second session today so hopefully we can build on that in P3 tomorrow afternoon and then see where we are in qualifying."
Team-mate Nico Rosberg was second quickest and stressed that fuel consumption will be tricky.
"It's definitely going to be very tough on fuel here, as we expected," said the German. "The screen on my steering wheel shows the fuel target for each lap and we're going to have to be very disciplined in the race."