Lucas di Grassi topped the timesheets in an interrupted Free Practice 1 at Santiago on Saturday morning, with running halted midway through the session after a crash by Sebastien Buemi.
The Brazilian driver posted a best time of 1:08.630 on a 250 kW run in the closing stages of FP1 to go 0.146 seconds quicker than Pascal Wehrlein’s Mahindra Racing entry.
Di Grassi’s Audi Sport ABT Schaeffler teammate Daniel Abt was classified ninth although the Audi-powered Envision Virgin Racing cars finished third and fourth after running 1-2 for a while.
All 22 drivers set flying laps, while the biggest incident of the session came for Buemi with a crash at Turn 7.
The red flag was brought out for 17 minutes while Buemi’s Nissan IM01 was retrieved, and the session was extended by ten minutes to make up for some of the lost time.
Buemi escaped from the incident unharmed but the car could be forced to miss Free Practice 2 while repairs are carried out, Nissan global motorsport director Michael Carcamo revealed on the live stream.
The Swiss driver only completed five laps early in FP1, with a best time five seconds off the pace.
Free Practice 2 will get underway at 10:15 a.m. local time for an additional 30 minutes of track time ahead of qualifying.
RESULTS: Free Practice 1