Having been trounced by Mercedes in Australia, team boss Stefano Domenicali concedes there is still a lot of work for Ferrari to do.
While Mercedes dominated Down Under, Ferrari lacked the pace in both qualifying and the grand prix to challenge for the lead.
Alonso could only manage fifth in qualifying before going onto finish in fourth place, although that one position he made up was due to Daniel Ricciardo being disqualified.
His team-mate Kimi Raikkonen finished seventh in the final classification by was almost a full minute down the road from race winner Nico Rosberg.
"We are behind, so what we have to do is make sure, in the days we have to work at home, to really concentrate and speed up the recovery that we need to have," Domenicali said.
"We have only done one race; there are still 18 to go and the margin is there and this is what I've asked my people to do.
"It was a very disappointing race and I can understand that we didn't really take away the maximum from our performance."
He added: "I think realistically we've seen a Mercedes that was strong, no doubt. With the others, without the problems we had maybe it would have been a different scenario but we had to take the result that came out.
"When I said we had some issues, it was related to the fact we couldn't use really the full power every lap. It's an issue we had to manage, so a good effort from the team to manage that.
"I really hope that we are ready to be at a certain level, to solve the issue that we had, at the next race in Malaysia."
The team boss also stated that Ferrari need to improve their engine and its performance if they hope to challenge the Mercedes-powered runners.
"I think that area is an area we need to improve. I know it seems not logical but the more power that you have, the less you stay on full throttle so you also benefit on the fuel," he said.
"I don't want to focus only on that because the car has to be improved. It's a matter of everyone doing his job and being focused on what they have to do at home without saying it's your fault or my fault."
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