Mixed fortunes for Mercedespublished at 13:15 Greenwich Mean Time 19 February 2015
Andrew Benson
BBC Sport chief F1 writer
"It's turning into quite a day for Mercedes at the second pre-season test in Barcelona. First, Lewis Hamilton has to abandon his running today because of a fever, and now it has emerged that the reason team-mate Nico Rosberg is not driving in his place is because the German has an inflamed nerve in his neck, which he has to rest.
"This, of course, puts Rosberg's planned participation in Friday's running in doubt. Reserve driver Pascal Wehrlein is driving on Thursday afternoon, but he is very inexperienced and Mercedes are unlikely to be keen on him doing the whole test if their race drivers do not recover."