Sebastian Vettel says Ferrari needs to focus on delivering with "every single step" of development in 2017 if it wants to stay ahead of Mercedes in the title fight.
Vettel and Ferrari lead the championships after three races, having beaten Mercedes to victories in Australia and Bahrain. F1's new regulations, which delivered bigger and faster cars to the grid, have helped Ferrari return to the front but will also create an intense development battle throughout the season.
With the success of upgrades later in the year likely be a key factor in determining the outcome of the title fight, Vettel says Ferrari cannot afford to dwell too much on its fast start.