Formula 1's first pre-season test came to a close on Thursday with Sebastian Vettel's best lap from Tuesday being the fastest of the week.
But it was clear that this first test was not about ultimate performance, and was more about system checks and endurance running – which is where world champion Mercedes focused much of its effort.
There were a few headline-grabbing times from ... Keep reading

Source: F1 test wrap: Barcelona week one by the numbers