The next time Formula 1 cars turn a wheel it will be in free practice for the season-opening Australian Grand Prix. Everyone at Barcelona last week knew that and the pressure was on.
The Circuit de Catalunya hosted the final round of winter testing, with teams and engine manufacturers aiming to combine what they had learned over 12 days of running with their off-track efforts, and leave with a race-ready package.
Some did that better than others and while testing is never definitive, the final four days added further detail to the 2015 form guide, including these key lessons.