Nico Rosberg admits he cannot feel ecstatic about winning races when team-mate and title rival Lewis Hamilton has been handicapped by unreliability. After securing his seventh consecutive win with a straightforward victory in Russia, Rosberg has opened up a 43-point lead at the top of the world championship. But while Rosberg has enjoyed a trouble-free start to the new campaign, reigning champion Hamilton, who has previously beaten Rosberg in every season of their three-year partnership, has been waylaid by two engine failures and three separate first-corner collisions. With the critics claiming that Rosberg's title lead will lack credibility unless the German prospers in a head-to-head...
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