Raikkonen was also the best Ferrari pilot in both practice sessions, finishing fourth in the second session behind 0.283 seconds behind leader Lewis Hamilton.
Fin, who took a better 0.2 seconds than his teammate Vettel, was also one of the top laps in 39 laps.
The champion of 2007, who assessed the work they did during the day, thinks Ferrari is the work to do.
"Overall it was a classic first day in Australia, everything was a bit different than the tests, I think it's not bad, but we can do better - the feelings we have are different from the winter tests, but this is a completely different track."
"It was not a bad day for us, we made different adjustments as if it were at the end of a week, and afterwards we searched for the answer to what was the best solution, which is very normal at the beginning of the season."
"In order to understand what the best solution is, we have to try different ways, we have to consider some things, but I do not start badly."
"There are things we need to do to bring everything together, and we can do it just by trying something."
Raikkonen agrees that finding the right setting is difficult.
"It is really hard to find a perfect setting and balance on such a track, and tomorrow we will try to improve the balance even if the weather is uncertain, obviously there are areas that need to be developed, but not as bad as I said."
"We will see how the weather will be tomorrow, and we will examine everything we do today and look at what we can do."
Raikkonen spoke about the track: "When you look at the track, the grip is better than the last." There are too many leaves but it does not really affect us. "
Raikkonen has recently talked about the incident with Bottas, "I did not see anything and it was the main problem, I knew it was there, but I never actually saw it." The team tried to tell me, but when it was told to me it was too late. "
"I saw the smoke and I knew it was somewhere behind me, but I could not see him, so I was afraid to go to one side, of course, it was not nice for him, I could not move because I could not see exactly where he was." said.