Lewis Hamilton lamented the "worst" cars, but Mercedes said his driving style wasn't suited to the ground-effect cars.

Lewis Hamilton says he is “exactly where I’m supposed to be” after an emotional first day on track in Ferrari’s new car.

With F1’s current regulations now in their fourth year, the performance gaps that gave front-runners comfortable advantages are shrinking fast. Teams that were once struggling to keep pace have had enough time with these cars to catch up on the learning curve. (See: Ferrari and McLaren’s surge last year .)