BARCELONA, Spain - Nico Rosberg followed up his 2015 Spanish GP victory by stepping back into his Mercedes on Tuesday (May 12) for another 146 laps of the Catalunya circuit in F1's first in-season test of the year.
Rosberg was, unsurprisingly, the fastest of the nine race and test drivers on track with a lap of 1min24.374. Only tail-ender Manor Marussia did not take part in the tests.
His schedule included set-up work for the 2015 Monaco GP on May 24 - a home race he won in 2013 and 2014 - the evaluation of new parts and some tyre work for Pirelli.