Hamilton and Rosberg battled for the lead throughout most of the 2014 Bahrain GP. (Photo: Peter J Fox/Getty Images)

Hamilton and Rosberg battled for the lead throughout most of the 2014 Bahrain GP. (Photo: Peter J Fox/Getty Images)

Mercedes F1 bosses and were both delighted that the exciting Bahrain GP went some way to silence critics of the 2014 rules.

Bernie Ecclestone and Ferrari chief Luca Di Montezomolo had both been critical of the new power units in the hours before the race.

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