Lewis Hamilton topped the timesheets as world champions Mercedes made an ominously fast start to F1 2017 on the first day of pre-season testing at Barcelona. But on a day when McLaren suffered crippling unreliability from its Honda engine and the Red Bull of Daniel Ricciardo twice broke down, F1 fans could have been forgiven for feeling a sense of deja vu as Mercedes dominated. There was, however, encouragement for Ferrari as Sebastian Vettel ran Mercedes close on slower tyres while Williams' FW40 also made a positive first impression. So, too, did F1 2017 after the winter 'rules refresh' with Hamilton's benchmark time, set on soft tyres, faster than any lap recorded over eight days of...
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