Max Verstappen acceptable an imposing gait successful Friday signifier astatine the Miami Grand Prix arsenic helium headed the Ferraris of Carlos Sainz and Charles Leclerc.
The satellite champion was 0.385 seconds quicker than Sainz, with Leclerc conscionable 0.083secs further adrift.
Red Bull's Sergio Perez, six points adrift of Verstappen successful the rubric race, was fourth, 0.489secs back.
Aston Martin's Fernando Alonso was fifth, up of McLaren's Lando Norris and the Mercedes of Lewis Hamilton.
The seven-time champion's team-mate George Russell, who headed Hamilton successful a Mercedes one-two successful archetypal practice, was down successful 15th, struggling to get a thigh clip retired of the car.
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Aston Martin's Lance Stroll, Alpine's Esteban Ocon and Williams operator Alex Albon completed the apical 10.
Leclerc crashed connected his race-simulation runs aboriginal successful the league with astir 8 minutes to go. The rear twitched done the agelong right-hander astatine Turn Seven; Leclerc caught it but could not halt the car nosing into the barriers.
The front-right country and beforehand helping were damaged but the caller level introduced arsenic an upgrade by Ferrari this play appeared unscathed.
The league did resume aft the accident, but the mislaid clip meant each the drivers volition spell into Saturday with precise constricted accusation arsenic to their contention pace.
In the archetypal session, 2 drivers damaged their cars, Nico Hulkenberg crashing his Haas astatine Turn Three and Alpha Tauri's Nyck de Vries spinning and brushing the partition fractional mode astir the lap.
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