Carlos Sainz (ESP) Scuderia Toro Rosso STR11 at Formula One Testing, Day One, Barcelona, Spain, Monday 22 February 2016. © Sutton Motorsport Images
The Italian team have switched from Renault to Ferrari power units ahead of the new campaign - a significant change which necessitated a change in the new machine’s architecture and contributed to the STR11 debuting in a temporary dark blue livery.
Toro Rosso plan to officially launch the new car - and its 2016 colour scheme - on February 29, a day before the second test begins.
Sainz is scheduled to drive on days one and three of this week's four-day session, with 2015’s top rookie scorer Max Verstappen behind the wheel on days two and four.
Be sure to check back to Formula1.com regularly and to follow our Twitter feed for extensive coverage of launches and winter testing.
