Despite no formal launch, the STR11 was one of the first to take to the track this morning. Currently they are running with a plain blue livery, but will reveal their colour scheme later in testing.
Over the winter, they switched back to Ferrari engines, requiring a redesign of the car. But, after a tough winter, they have made it here on time and Red Bull boss, Christian Horner, has fears that they may beat Red Bull in the first part of the season.
Sainz is first to take to the track, with Max Verstappen taking over tomorrow.