Unlike last year, Ferrari were sat at the bottom of the timesheets during the first week of winter testing in Barcelona. The Italian team seem to be missing something this year, depending on how many sandbags are on the car.
Ferrari recorded one of the fewest lap counts in the whole field. They are 140 laps behind Mercedes, virtually a day of track running. They will need to get busy during the second week to ensure they've got all the data they need.