First Hamilton, now Vodafone: McLaren suffer another big loss on eve of new F1 season as sponsor walks away

New season: McLaren drivers Jenson Button and Sergio Perez with the 2013 car sponsored by Vodafone

McLaren have confirmed they are to lose title sponsor Vodafone at the end of the season. Vodafone have decided to end the partnership which has been in place since 2007 'to focus on business priorities away from Formula One sponsorship'.

Hamilton all smiles ahead of first race for Mercedes as new F1 season kicks off

At ease: Hamilton was relaxed ahead of his first race for Mercedes at this weekend's Australian Grand Prix

Lewis Hamilton was looking relaxed ahead of the kick-off to the new Formula One season at the Melbourne Grand Prix this weekend. Hamilton, who will race his first Grand Prix since moving to Mercedes from McLaren, was smiling as he sat with the media just off Melbourne's St Kilda beach.

Australian Grand Prix guide: All you need to know about the race in Melbourne

Raring to go: Albert Park will host the first Grand Prix of the 2013 season in Melbourne

There has always been an unpredictability about any season-opening race, but ahead of this year's Australian curtain-raiser the uncertainty appears magnified. Throughout testing a driver or team principal fudges when it comes to discussing the merits of their car in comparison to the opposition.

F1 season preview: Motorsport's biggest roadshow returns in Melbourne this weekend, but can anyone stop Vettel and Red Bull's romp to a fourth straight crown?

Sebastian Vettel

Ahead of the new season which kicks off in Melbourne on Sunday, we’ve spoken to Sportsmail’s panel of Formula One experts to gauge their opinions, predictions and hopes for what promises to be another stellar campaign.

Formula One schedule: Your guide to this season's calendar

Lewis Hamilton

The Formula One circus will take on five continents over eight months of gruelling action in 2013. Read Sportsmail's guide to the 19 races which make up this year's calendar.

Formula One drivers and teams: The lowdown on this year's stars

Lewis Hamilton

Read Sportsmail's lowdown of the 22 grand prix stars and 11 constructors who will make up this season's Formula One grid.

Lewis Hamilton: I'm either loved or hated... dad doesn't like my tattoos but I don't need his approval

Lewis Hamilton

Between the tattoos and the bright red £20million private jet, Lewis Hamilton says it is only now that we are starting to see the real him. At Mercedes he can express himself.

We're not heading for dominance! Red Bull boss Horner plays down fears that F1 is turning 'unhealthy'

Unhealthy: Red Bull Christian Horner principle Christian Horner believes F1 is not heading for a similar period to the Ferrari domination years

Even before a wheel has turned in anger, the debate regarding Red Bull's stranglehold on Formula One is already fully up to speed.

You're not going to win on that! Chris Hoy takes Di Resta out for a spin

Di Resta

Olympic Track Cycling Champion Chris Hoy has found a new partner by getting British Formula One driver Paul di Resta to ditch four wheels for two ahead of this weekend's Australian Grand Prix.

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