Carlos Sainz held off Sergio Perez and Lewis Hamilton, who had both been in excellent form all weekend of the British Grand Prix.
Leclerc will be "extremely thrilled" if Sainz converts his advantage into his first F1 victory, while the Monegasque believes the team's aim is a 1-2 finish.
Carlos Sainz finished second to Max Verstappen in the Canadian Grand Prix, less than a second behind the Red Bull driver.
Charles Lerlerc has been forced to suffer a 10-place grid penalty as Ferrari will be replacing the control electronics of Ferrari F1-75.
Carlos Sainz and George Russell were the prominent voices for potential neck and back concerns due to their cars' porpoising.
Red Bull team head Christian Horner understands that his team cannot afford to take its foot off the throttle.
The Brit finished P5 at the 2022 Monaco Grand Prix which means that so far this season, he has not finished any lower than fifth.
This season, there are two Spaniards on the grid for the Spanish GP, Fernando Alonso of Alpine and Carlos Sainz of Ferrari.
The current Ferrari driver drove the Ferrari 312 B3, which Lauda drove at the time, for a few demonstration laps on his local circuit.
Max is currently 19 points behind Leclerc in the standings, with Red Bull six points behind Ferrari in the constructors' title.