McLaren's championship leader Lando Norris went fastest in Thursday's second practice for the Las Vegas Grand Prix, which featured two late red flags.
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The Briton, who boasts a 24-point lead over teammate Oscar Piastri in the drivers standings entering Sunday's race, completed his hot lap just before crimson fury struck the Las Vegas Strip.
Norris was quickest around the 6.201-km street circuit with a lap of 1min 33.602secs – 0.029sec ahead of Mercedes' Kimi Antonelli.
Lando Norris sets the fastest time in FP2 👏
— Formula 1 (@F1) November 21, 2025
The McLaren driver led the way from Kimi Antonelli and Charles Leclerc 💨#F1 #LasVegasGP pic.twitter.com/zklBK8SSUZ
Moments later, the session was red-flagged for a possible loose manhole cover.
Cars returned to the track with six minutes remaining, time enough for Charles Leclerc of Ferrari to end his session behind a safety barrier due to a gearbox issue, before a final red flag concluded the session early.
Monaco's Leclerc was third in a session where many of the drivers did not have a soft tyre run, including Piastri, who was 14th and 0.891 adrift of title rival Norris.
Australian Piastri, who was 34 points clear in the standings after winning the Dutch Grand Prix in August, has not managed a podium finish in the past five races.
While Norris cannot secure the world championship crown this weekend, he could doom the repeat bid of four-time defending champion Max Verstappen, the Dutchman entering 49 points adrift.
Lando Norris tops the timesheets to round out Las Vegas Friday! 💨
— Formula 1 (@F1) November 21, 2025
Here's the full classification from second practice ⏱️⬇️#F1 #LasVegasGP pic.twitter.com/eDEh2hUWQk
Verstappen was ninth in the second session, 0.503 off the pace.
Leclerc set the fastest time in first practice in 1:34.802 with Thailand's Alexander Albon second for Williams and Japan's Yuki Tsunoda of Red Bull third.
A lack of grip marked the opening session on the Las Vegas strip as many cars skidded or failed to brake in some corners, Norris touching a wall in an incident without consequences.