Reliability was not the top concern for new Ferrari boss Fred Vasseur before the start of the Formula One season but Sunday's opening race in Bahrain sent it back up the list of priorities. Charles Leclerc, who led a Ferrari one-two from pole at Sakhir last year, lost power and retired 17 laps from the end while Carlos Sainz finished fourth. Ferrari had already changed the energy store on Leclerc's car before the race, a blow with drivers having only two for the 23-race season without a grid penalty. Until then both drivers had been more focused on whether their car could match the speed of the Red Bull, who suffered a double retirement last year but this time cruised to a o...Keep on reading: F1: Ferrari puts reliability top of the to-do list