Related StoriesLotus driver Romain Grosjean set the fastest time of the second Formula 1 pre-season test, but Mercedes cast a shadow over all rivals at Barcelona.Grosjean used Pirelli's super-soft tires on Sunday to make it three out of four days on top for the team, after teammate Pastor Maldonado went...

Related StoriesPastor Maldonado used soft tires to go fastest for Lotus-Mercedes on a Barcelona Formula 1 test day disrupted by a collision between Felipe Nasr and Susie Wolff.The Williams and Sauber came together early in the afternoon session, when Wolff was on an out-lap and morning pacesetter Nasr was at...