Are Mercedes still the team to beat? Have Red Bull found a way to close the gap on their rivals. We'll find out some answers over the course of the weekend as Formula 1 winter testing in Bahrain kicked off on Friday. There was certainly plenty to see as the cars hit the track with new colour schemes and drivers behind the wheel.
Check out all the best images of the day in the photo album below.

Formula 1 winter testing Bahrain Day 1
Friday March 12, 2021 is the first day for fans and media to get a look at the new Formula 1 cars en masse. We put the most beautiful pictures together for you in this album.
View the album