Formula One season gets underway on Sunday with the Australian Grand Prix
Mercedes head into the new campaign looking to defend both championships
Lewis Hamilton begins year as favourite in bid to land his fifth title
Sportsmail reporters look at the big questions heading into the new season
It is lights out for a new Formula One season this weekend when 20 drivers and 10 teams line up on the grid for the Australian Grand Prix.
As ever, pre-season testing only offered small clues about the state of play within the sport that will see Lewis Hamilton and Mercedes try and defend their world titles this term.ADVERTISEMENT>
But who can challenge them? Sportsmail reporters assess how the season may shape up as well as focusing on the other big question ahead of the Melbourne curtain raiser.
Source : http://www.dailymail.co.uk/sport/article-5522225/amp/F1-2018-preview-Ferrari-Red-Bull-bring-fight-Mercedes.html