Sebastian Vettel is facing up to a season run-in that looks set to contrast sharply with last year's victory blitz, which got underway at the Belgian GP. Vettel's success at Spa was the first of nine straight wins; 12 months on, however, the defending World Champion finds himself experiencing wildly differing fortunes.His struggle to match new team-mate Daniel Ricciardo – he remains winless this season while the Australian so far has two victories to his credit – is well-documented, as are Red Bull's difficulties with the power and reliability of Renault's power units.And it's the latter concern that is looming even larger for Vettel now, specifically the number of engines he's...
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