Sebastian Vettel's Malaysian Grand Prix win has come as a welcome surprise to those fearing another year of Mercedes dominance. It might be too early to suggest Ferrari will pose a real danger to Mercedes' title hopes, but it nevertheless provides a dose of early-season intrigue. BBC Sport takes a look at what has helped Ferrari back on to the top step of the podium. Wrong strategy call proves costly When polesitter Lewis Hamilton held on to first place at the first corner, it looked like another Mercedes win was on the cards. However, the appearance of the safety car on lap four led to Mercedes and Ferrari making different decisions. Hamilton and Nico Rosberg were called in for a change...
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