Lewis Hamilton headed a Mercedes one-two in the opening practice session for the 2017 Formula 1 season-opening Australian Grand Prix. Hamilton led new team-mate Valtteri Bottas as the German marque offered an early reality check in Melbourne after Ferrari dominated pre-season testing. The Mercedes drivers led as soon as the class of 2017 started posting representative lap times, with Bottas holding the early advantage with a 1m25.142s on super-softs. The Finn was the first to switch to ultra-soft tyres, and he improved to a 1m24.803s despite a mistake in the final sector on his best lap. Hamilton made no such error when his turn came, and the three-time champion ended up more than half a...
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