Lewis Hamilton has traced teammate Nico Rosberg's surge in form back to a technical change Mercedes made seven races ago during the Singapore Grand Prix weekend. Overall, the new triple world champion says 2015 has been the 'best year of my career in terms of my driving and overall performance'. Indeed, he dominated Rosberg for most of the season, wrapping up the drivers' title in Austin in September. But it is German Rosberg who is finishing the season the strongest, with a five-race run of poles and charging for a hat-trick of wins as the calendar concludes in Abu Dhabi. 'People have been asking whether I have subconsciously backed off a little because the championship has been won,'...
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