Ferrari team boss Maurizio Arrivabene believes Sebastian Vettel's victory in Brazil proves the Scuderia has built a "very good car".
Vettel looked to have secured pole position for the race after Lewis Hamilton crashed out in Q1, but was then pipped by Hamilton's Mercedes team-mate Valtteri Bottas by just 0.038 seconds.
But the German got a great start to jump Bottas into Turn 1 and controlled the pace before crossing the finish line to claim his and Ferrari's fifth victory of the 2017 season.
That, in light of recent reliability issues which cost them a potential title, proves the team have a great car according to Arrivabene.
"Already in qualifying, it was clear that the SF70H was quick and well prepared," said Arrivabene. "On Sunday, we got the confirmation that we have a very good car at our disposal.
"The result of this race is also down to the great job carried out by the team, both here at the track and back in Maranello, not forgetting the drivers who, on the day, know how to step up to the mark.
"Now we look ahead to the next challenge in Abu Dhabi, still determined to give it our all, right to the very end."