Kimi Antonelli leads Mercedes 1-2 in chaotic Montreal FP1

Kimi Antonelli topped the sole practice session (FP1) for the Canadian Grand Prix in Montreal with a best lap of 1m13.402s.

George Russell recorded the second-fastest time in FP1 with a 1m13.544s, 0.142 seconds behind Antonelli.

Mercedes occupied the top two positions in FP1, giving the team a one-two result and showing a clear pace advantage with an upgraded package (W17).

FP1 was the sole practice session on the Sprint weekend and was scheduled to last 60 minutes but was extended after stoppages.

Officials extended the practice session by 19 minutes (Total Motorsport reported a different figure of 15 minutes added).

The session was stopped and red-flagged three times.

Alex Albon struck a groundhog (marmot) and crashed heavily into the Turn 7 wall, triggering a lengthy stoppage of roughly 15 minutes.

Liam Lawson stopped with a technical/power issue that prompted a stoppage—sources described it as a power-steering fault (PlanetF1) or a power loss exiting Turn 2 that triggered a VSC (F1 Oversteer).

Esteban Ocon hit the Turn 7 wall, lost his front wing, and faces a post-session investigation over a possible pit-exit under a red light.

Franco Colapinto stopped with a suspected electrical throttle issue and said, “My throttle is not working.”

The FIA used FP1 to trial a new rear-light MGU-K derating system (trial lights reported to flash blue, purple and yellow to warn of derating).

Lewis Hamilton was third in the session, 0.774 seconds slower than Antonelli (BBC).

Charles Leclerc was fourth, Max Verstappen fifth, Lando Norris sixth and Oscar Piastri seventh in the FP1 classification reported by multiple sources.

Oscar Piastri had earlier posted a sub-75s lap of 1m14.963s, while Max Verstappen had set an earlier benchmark lap of 1m15.895s during the session.

The practice combined competitive lap times, multiple incidents and the FIA technical trial, limiting clean running and leaving teams and officials to review damage, reliability and the light-derating trial ahead of Sprint Qualifying.