Lewis Hamilton set the early pace in Friday's first practice for the Korean GP, outpacing Sebastian Vettel by 0.037s while Kimi Raikkonen crashed.
Marussia test driver Rodolfo Gonzalez was the only driver to set a time in the first 30 minutes and also the only one to crash his car.
With 24 minutes on the clock, he hit the inside barrier at Turn 13, sheering off the front wing and the tip of his Marussia's nose before spinning around and tagging the wall with the car's rear.
With Gonzalez back in the pits it was Sergio Perez's turn to control the timesheets as the McLaren driver lowered the benchmark lap after lap ahead of Force India tester James Calado and his own team-mate Jenson Button....
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