"I think if I was out at the same time, if I was out as late as they had gone out, I think I could have matched their time.
"But then we got to the race and they had great pace again, as they always do and he (Vettel) disappeared, along with everyone else. Hopefully in the next race we won't have that problem."
Lotus' Kimi Raikkonen is the top of the drivers' rankings following the first race after the 2007 world champion took the checkered flag at Albert Park in Melbourne.
But the Finn denied suggestions he will be the man everyone is looking to beat in Sunday's race.
"There's no target (on my back)," said the 32-year-old. "We're not doing any different things this week from what we did previously.
"So whether people think we are the leaders makes no difference to how we work, what we're going to do this weekend or any other weekend. We'll try to do our best and hopefully we can score some good points."