JEREZ, Spain (AP) -- Sebastian Vettel posted the fastest lap for Ferrari on the first day of pre-season Formula One testing, while last year's championship runner-up Nico Rosberg clocked a massive 157 laps.
Rosberg lost out on the title to Mercedes teammate Lewis Hamilton in a gripping and often tense tussle last year that went down to the final race in Abu Dhabi.
He is in the mood to go one better, if Sunday's testing is anything to go by. The German driver was so keen to pile on the laps that he even had lunch sitting in his car.
Vettel's best lap of 1 minute, 22.62 seconds was .157 quicker than Swedish driver Marcus Ericsson and .486 better than Rosberg.
There are four days of testing. Hamilton drives on Monday and Wednesday.