Lewis Hamilton won the 2014 US GP after he beat his team mate Nico Rosberg on track and moved closer to his second world championship.

Instead of running their trademark silver livery, Mercedes opted for all-black design with Petronas green stripes as presented on original version, to show their stance against racism and discrimination.

Nico Rosberg achieved his first F1 career victory on this day n 2012 and gave Mercedes their first victory since 1955, the day after winning his first pole position, which marked a new, hugely successful chapter in Mercedes' F1 history.

Mercedes and Racing Point had to change the rear suspension detail at the last minute because of the position of the rear brake cooling intakes that Red Bull protested ​​in Melbourne.

The current world champions had to take 'countermeasures' to address the reliability issues they experienced in pre-season testing.

The current world champions dominated this year's tests with the best times, the most exciting innovation and the most laps, but other teams had very good preparations, with nine of them driving more than 80% Mercedes' laps.

The world champions have confirmed that Lewis Hamilton stopped on the track due to engine problems, which limited his running to only 14 laps, and Mercedes had the worst day of the season with only 61 laps.

Sebastian Vettel stayed fastest by the end of the second day of the second Barcelona test after setting best time for Ferrari this year while Lewis Hamilton completed only 14 laps in the afternoon before he was hit with engine problems.

Mercedes is by all accounts the winner after the first test in Barcelona, ​​but it is enough to remember 2019 and the wrong conclusion that followed after the first test to wait at least the second test for all teams to do real qualifying simulations.

Watch the comparison of the fastest lap at this year's Barcelona Tests and last year's pole position, which is still a track record - both laps were driven by Bottas and last year's lap is 0.326 s faster.