The first three sessions of 2013 are here, and this is potentially some of the most crucial practice there is. Last minute checks before the cars hit the track in anger, plus any new bits and pieces can be bolted on before the qualifying and racing begins. The sun should be shining over Albert Park, and it's going to be heavenly to see those cars take to the tarmac once more. Two lots of ninety minutes on Friday, plus an hour on Saturday should lead us nicely into the heart of the weekend.