Carlos Sainz admits that Mercedes and two rival Formula 1 teams ‘inspired’ the design of the new SF-24 car but Ferrari fashioned an array of pure ideas that ‘cannot be seen’. The Scuderia shook the covers off their new challenger last week with a shakedown session at Fiorano. But the F1 paddock will get a glimpse of the latest Ferrari in Bahrain this week at pre-season testing. It is also the final Ferrari for Sainz after the team signed Lewis Hamilton. Hamilton will replace the 29-year-old in Maranello next year after triggering a release clause in his contract with Mercedes. Sainz was in tal…