The second Free Practice session for the 2023 F1 Las Vegas Grand Prix is set to begin at 10:00 UK time - a delay of two hours.
A water cover valve failed in FP1, leading to Carlos Sainz and Esteban Ocon suffering severe damage to their cars by running over the drain.
Sainz damaged the monocoque, power unit and battery in the destroyed chassis, while Ocon's Alpine A523 machine was changed successfully by the team after he collided with the drain on his in-lap just eight minutes into the session.
The remainder was cancelled with the FIA, F1 and engineers inspecting the track to find solutions.
This has led to a delay of FP2 from its original time of 00:00 local time, with the running now set to get underway for an extended 90 minutes at 02:00 local.
The track action must be finished by 4am - when the track is required to be handed back over to Las Vegas residents.
"We are currently expecting around two hours of delay from the originally scheduled start time for FP2 in order for the local circuit engineering team to carry out the necessary works on the track," explained an FIA spokesperson.
"The session will be extended to 90 minutes."
However, F1's rules state that all teams have to accept to run a second practice session if more than three hours have elapsed from the first one.
With Sainz's car being completely destroyed, it is therefore unlikely Ferrari would agree to this.