Formula 1 drivers have been warned about cutting the chicanes at the Monaco Grand Prix by race director Charlie Whiting.
Ahead of final practice, Whiting sent a note to drivers telling them that they will be reported to the stewards if they start using too much curb in qualifying or the race. In particular, he is concerned about the chicanes at the exit of the tunnel and at the Swimming Pool section.
The note said: "Provided a part of the outer wheel remains on the track when crossing the apex, we will be satisfied that the driver is using the track. However, if all parts of all four wheels are on or behind a curb when they cross the apex, a report will be made to the stewards.
"Judges of fact have been appointed in key areas around the track to provide race control with immediate reports."