Winners and losers from testing day one
You can't read much into lap times on day one of testing, especially after a rules overhaul. But there are lessons to be learned and some clear indications about who started well, and who needs to get it together over the remaining seven days of running
Finally, all 10 of Formula 1's 2017 cars hit the track together for the first day of serious running in the opening pre-season test at Barcelona. But to look at the timesheets you wouldn't think much has changed, with Mercedes fastest with Lewis Hamilton.
Mercedes has become one of the most successful teams in grand prix history over the past three years, and it's still among the early winners in testing having had an ominously good first day.
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