– Championship leader Maverick Viñales returned to the top of the leaderboard for Yamaha during a crash-strewn third practice session at the Circuit of the Americas.Viñales clocked a time of 2:03.979, the fastest of the weekend, as several of his rivals failed to improve their laps from Friday's two sessions.Viñales' time was 0.317s quicker than Repsol Honda rival Dani Pedrosa, with Cal Crutchlow third for LCR Honda.Reigning champion Marc Márquez wound up fourth but crashed twice during the session, once at Turn 15 and again at Turn 18, though both times he walked away unscathed.Ducati riders Jorge Lorenzo and Andrea Dovizioso, Aspar's Álvaro Bautista and Suzuki pair Andrea...
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