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.
But when you look at all the winners and losers from Monday, some of the outcomes are a little more surprising than where Mercedes sits.