Mercedes team boss Toto Wolff has admitted that he fears unreliability being the ultimate decider between his two drivers as they fight for the F1 world championship. The Austrian saw the momentum swing from Nico Rosberg's side of the garage in favour of Lewis Hamilton at the Singapore Grand Prix, with the German suffering his second DNF of the campaign after an electrical glitch left him without steering wheel function and unable to continue after his first pit-stop. Hamilton, meanwhile, had a largely faultless run to victory, turning a 22-point pre-race deficit into a three-point advantage with five races to run. Wolff conceded that the continuing reliability problems were a major...
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