Following a violent crash during warm-up for the Indonesian GP, Marquez suffered a new episode of the diplopia – or double vision – which sidelined him for three months late last year.
Missing the Argentina GP while he recovered, the Honda rider was given the all-clear to continue racing this weekend at his beloved Circuit of the Americas.
And it only took Marquez five laps to get back up to speed, the seven-time COTA winner going top of the pile with a 2m04.469s just 15 minutes into FP1.
He would stay at the top of the timesheets with that lap until just under 12 minutes to go, when Maverick Vinales on the Aprilia went 0.096s clear with a 2m04.373s.
Having made a breakthrough with set-up on the Aprilia in Indonesia and carrying that through to a strong Argentina weekend, Vinales came into COTA confident he could be strong.
Rins had his session interrupted at around mid-distance, with his GSX-RR slowing on the exit of Turn 11 onto the back straight.
But the 2019 COTA race…
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