BBC Sport - Hamilton and Rosberg mystified by Mercedes' Singapore struggle

Singapore struggles mystify Mercedes

Mercedes' Lewis Hamilton and Nico Rosberg are unable to explain their poor performance at the Singapore Grand Prix.

After a dominant season, Hamilton suffered a loss of power while running fourth and dropped down the field before retiring, while Rosberg could only finish fourth at Marina Bay.

Winner Sebastian Vettel is now only eight points adrift of Rosberg and a real threat for second place in the championship if Ferrari can maintain their form.

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