The surface on the outside of the final sequence of corners at Hockenheim caused controversy at this year's race when a host of drivers – including Charles Leclerc, Nico Hulkenberg and Lewis Hamilton – all lost control in the wet and hit the wall.
Leclerc says low-grip Hockenheim run-off "unacceptable"
FIA sees no issue with Hockenheim's drag strip run-off
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Read more: F1 would now reconsider Hockenheim drag strip - Masi - Motorsport.com