The Formula 1 season bursts into life this weekend with Melbourne set to provide the first glimpse into how the 2018 campaign will play out.
Teams have clocked up thousands of kilometres in two four-day tests at Barcelona’s Circuit de Catalunya in preparation for the first race at the annual Albert Park curtain raiser.
Lewis Hamilton and Mercedes once again proved a dominant force last year to win the drivers’ and teams’ titles after seeing off a spirited challenge from Ferrari and Sebastian Vettel.
But will this year see the Silver Arrows’ stranglehold on the sport for the last four years broken?
Pre-season testing suggested Mercedes has produced a championship challenger in the shape of the W09 for Hamilton and team-mate Valtteri Bottas.
While car looks to be solid, reliable and fast, question marks have been raised around its form on softer compound tyres.
This weekend will see the Ultrasoft, Supersoft and Soft tyres in use.
The reigning champions were outmanoeuvred by Ferrari on strategy in Albert Park last year as Vettel came through to take a famous win.
Vettel believes the SF71H, he will race alongside Kimi Raikkonen, will be a match with its main rivals Mercedes and Red Bull.
Red Bull appears to have arrived in Australia with plenty of optimism after a strong showing in testing.
Daniel Ricciardo feels the squad is in its best shape for a season opener since he joined the operation in 2014, and will be desperate to impress in front of home support.
Red Bull has not appeared on the podium in Australia since 2013 although Ricciardo and team-mate Max Verstappen certainly look to be in the mix this year.
Ricciardo finished second in 2014 before being excluded from the results due to a fuel flow breach, his best finish remaining a fourth in 2016.
While the podium is expected to be fought over by the top three teams, there is plenty of intrigue in the midfield battles involving Force India, Renault, Williams, Toro Rosso, Haas F1, McLaren and Sauber.
Force India head into the new season with an unchanged line-up of Sergio Perez and Esteban Ocon, but it remains to be seen if they will lead the midfield battle.
McLaren has switched from Honda to Renault power but its pre-season troubles continued with oil leaks and turbocharger issues limiting running for Fernando Alonso and Stoffel Vandoorne.
It will be interesting to see where the former world champion team lies this weekend.
Renault boasts a strong driver line-up in Nico Hulkenberg and Carlos Sainz Jnr, while Williams has elected to partner Lance Stroll with young Russian rookie Sergey Sirotkin.
Meanwhile, Haas F1 has impressed in the off-season which could see Romain Grosjean and Kevin Magnussen challenge for points.
Likewise, Toro Rosso has raised its level of expectation after relatively solid test runs with new Honda power for Kiwi Brendon Hartley and Pierre Gasly.
Finally, Sauber drivers Charles Leclerc and Marcus Ericsson are confident improvements will see their car drop its backmarker tag this year.
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