George Russell's Williams suffered significant damage after running over a drain cover and shedding vast quantities of carbon fibre in first practice for the Azerbaijan Grand Prix, with the necessary track repairs set to cause a lengthy delay to Friday's on-track action.
The session was swiftly cancelled, with checks to every drain cover on the circuit now be required, costing the teams an entire session.
It is unclear if the checks will be completed in time for FP2.
Russell's car appeared to suck the drain cover off the floor, slamming it into the underside of his car just 10 minutes or so into Friday's first session.
RED FLAG: The session is halted after George Russell encounters trouble with a drain cover and is forced to a standstill