WATCH: What we learned on Day 1 of the Official Pre-Season Test in Bahrain

The first day of Bahrain's Official Pre-Season Test kicked off on Thursday, Pierre Gasly setting the benchmark before Sergio Perez's late spin and the resulting red flag...

And there was so much else to unpack from Day 1 at Sakhir, with Mercedes' new-look W13 turning heads – Lewis Hamilton and George Russell having turned steady laps through the day – while Ferrari showed promising pace once again.

LIVE COVERAGE: Day 2 of the Official Pre-Season Test in Bahrain

Red Bull enjoyed a highly productive session with Sergio Perez at the wheel – his day only blotted by a late spin – while Kevin Magnussen also returned to the paddock, ready to resume his career as a full-time F1 driver for Haas.

For that and much more, watch Will Buxton, Sam Collins and Jolyon Palmer discuss the opening day of testing in the video player above.

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Coverage of the Official Pre-Season Test is also available live in selected territories via your F1 broadcaster.