Summary

  • Lando Norris ends opening day quickest in the McLaren

  • George Russell for Mercedes second, Red Bull's Max Verstappen third

  • Lengthy delay during afternoon session due to circuit-wide power cut

  • First look at Lewis Hamilton for Ferrari

  • Day two starts at 07:00 GMT on Thursday

  • Season-opening Australian Grand Prix 14-16 March

  • Verstappen aiming for fifth consecutive drivers' title in 2025

  • McLaren begin defence of constructors' championship

  • Get involved: #BBCF1

Live Reporting

Tasnim Chowdhury

  1. How do teams measure performance in testing?

    Oscar Piastri takes the McLaren out with an aero rake in BahrainGetty Images

    F1 teams have access to a treasure trove of data, telemetry, and GPS systems that help them measure the performance of their car.

    During testing, teams will change certain aspects of the car between runs, and will then use their analytics tools to measure whether the tweaks were a benefit or a hindrance.

    Teams also modify their cars with performance-measuring devices, including the visually striking flow-viz paint and aerodynamic rakes, which help demonstrate how efficiently the car is moving through the air.

  2. Lewis Hamilton is back in the Ferrari garage, as his engineers get to work on his new car.

    Alpine's rookie Jack Doohan has topped the leader board with a time of 1:33.196.

    I have already mentioned areo rakes but how else do teams measure performance?

  3. Lenses trained on Hamilton

    Chris Medland
    F1 journalist in Bahrain

    After the glitz of the F1 75 Live event in London last week, it does feel like a slightly underwhelming start to a new season when cars just roll out of the pit lane at an empty Bahrain International Circuit.

    A little badge of honour has been earned by Mercedes, as rookie Andrea Kimi Antonelli is first out on track.

    There were a few more lenses trained on this red car behind him, as the man the Italian replaced, Lewis Hamilton, took out the new Ferrari.

    Lewis Hamilton comes out the pit lane in BahrainBBC Sport

  4. Three rookies on track

    Three of the five rookies are on track for this morning's testing session.

    Andrea Kimi Antonelli in Mercedes, Alpine's Jack Doohan and Oliver Bearman in the Haas.

    Good luck to them in their first season in F1.

  5. Lawson fastest

    It has just been only 15 minutes of the testing session.

    Liam Lawson is fastest in the Red Bull. He's just nipped back into the garage.

    Lewis Hamilton is just a second behind in the Ferrari. Andrea Kimi Antonelli is third.

  6. Aero rakes in place

    Photographs take pictures of Lewis Hamilton coming out of the Ferrari garageGetty Images

    Cars have metal areo rakes attached to different parts of the car. This helps the teams get data on the air flow around the cars.

  7. Lewis Hamilton is now making his way around the track in the Ferrari. He's going to want to make sure he's got to grips with his new set-up before the first race in Melbourne.

  8. Day one morning schedule

    Oscar Piastri - McLaren

    Lewis Hamilton - Ferrari

    Andrea Kimi Antonelli - Mercedes

    Liam Lawson - Red Bull

    Yuki Tsunoda - Racing Bulls

    Jack Doohan - Alpine

    Alex Albon - Williams

    Fernando Alonso - Aston Martin

    Oliver Bearman - Haas

    Nico Hulkenberg - Sauber

  9. Eighteen-year-old Andrea Kimi Antonelli beats the traffic and is first out on track in the Mercedes, who else is joining him in the early session?

  10. Hello

    Good morning and welcome to day one of testing.

    We have seen all 10 teams reveal their liveries in the 75th anniversary event last week but now we get to see the 2025 cars in action.

    Teams have just three days of testing to get to grips with their set-ups before the season officially kicks off in Australia.

    Lewis HamiltonGetty Images