Nico Rosberg says there is still much work to be done on the set-up of his Mercedes despite both himself and Lewis Hamilton dominating proceedings once more during Friday practice for the Spanish Grand Prix. The German endured a fraught day around the Circuit de Catalunya when an ERS cooling system issue restricted him to just nine laps, which was only good enough for fifth on the grid. Bouncing back in FP2, Rosberg was second fastest, four tenths behind his team-mate Lewis Hamilton but a substantial six tenths up on the chasing pack. Indeed, despite his positive position, a somewhat downbeat Rosberg was disappointed with his day in the car and the gap to his team-mate, admitting he hasn't...
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