The official three-day F1 pre-season test has concluded – and it looks very tight at the top ahead of Australia. Kieran Jackson explains what we learned in Bahrain

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 .)

Lewis Hamilton has shared his enthusiasm about his first month as a Ferrari driver, declaring that it "couldn't have gone any better."