Photo gallery: 21/11. Las Vegas Grand Prix, Friday

Leclerc: I know which direction to take with the car Charles Leclerc topped the first practice in Las Vegas and posted the third-fastest time in the second session, but Lewis Hamilton also said he was happy with the car, even though he finished the day in tenth place... They replaced the exhaust system on three cars. The FIA confirmed the replacement of the exhaust system on the Racing Bulls and Sauber cars. Charles Leclerc avoided penalties. In the final minutes of the second free-practice session at the Las Vegas Grand Prix, Charles Leclerc stopped off the track due to gearbox problems. After the session it emerged that the Ferrari driver's actions are being investigated by the stewards, as he is alleged to have breached paragraph 26.5 of the Sporting Regulations. Ben Affleck and Matt Damon will make a film about Newey. Ben Affleck and Matt Damon have become executive producers of the new documentary Turbulence: The Greatest Mind in F1 ("Turbulence: The Greatest Mind in Formula 1"), which is dedicated to Adrian Newey. Isola: The condition of the track was rapidly improving. Pirelli are satisfied with the performance of the tyres in Las Vegas. After the session was moved two hours earlier, it wasn't as cold, and the condition of the asphalt quickly improved… The FIA explained the situation with the hatch during the second practice. The second free practice session of the Las Vegas Grand Prix was twice interrupted by red flags because of a manhole cover in front of Turn 17. The FIA issued a statement explaining the situation.