Kimi Antonelli laid down an emphatic marker ahead of the Canadian Grand Prix, topping the only practice session of the weekend with a blistering lap that left his Mercedes team-mate George Russell trailing by just over one-tenth of a second. The session, however, was far from straightforward — three red flags, a groundhog collision, and multiple off-track excursions turned the hour-long run into a disrupted affair for the Montreal paddock.

Antonelli enters the weekend with a 20-point championship lead over Russell, and the Italian teenager wasted no time in demonstrating why he is the man to beat. His benchmark time of 1m 13.402s, set on the soft tyre, proved untouchable as rivals struggled to find rhythm amid the stoppages.

Mercedes in a Class of Their Own

The Brackley squad brought a substantial upgrade package to Montreal, and the early signs suggest it has paid dividends. While Antonelli and Russell traded fastest laps in a private duel at the front, the rest of the field was left adrift. Ferrari’s Lewis Hamilton, third fastest, was more than seven-tenths behind Antonelli’s ultimate pace — a significant gap on a circuit where margins are traditionally tight.

Russell had briefly threatened to usurp his younger team-mate when he became the first of the leading runners to bolt on soft tyres with 15 minutes remaining, immediately jumping to the top of the timesheets with a 1m 13.850s. But Antonelli responded emphatically, shaving nearly half a second off that mark to cement his position at the head of the field.

The session was not without drama for Russell, however. The Briton ran deep at Turn 1 on a subsequent push lap, cutting the track before improving his time. Moments later, he suffered a spin at Turn 2, tapping the barrier before rejoining unharmed. It was a rare blemish in an otherwise strong showing from the Mercedes pair.

Red Flags Disrupt Running

The session was interrupted on three separate occasions, costing teams valuable track time in the sole practice window before Sprint Qualifying later on Friday.

The first stoppage came just minutes into the session when Liam Lawson ground to a halt through Turn 5 with a mechanical issue on his Racing Bulls machine. The New Zealander’s stricken car required recovery, and four minutes of additional time were appended to the clock.

With the track still incredibly dirty after limited running, drivers struggled for grip from the outset. Lando Norris sailed into the run-off at the final chicane, Max Verstappen dipped a wheel onto the grass at Turn 7, and Oscar Piastri skipped the final chicane as he pushed the limits. Hamilton briefly cut across the grass through the Turn 8/9 chicane, while Antonelli himself went deep at Turn 1 during his exploratory laps.

The second red flag was triggered by a bizarre incident involving Williams’ Alex Albon. The Thai driver struck a groundhog on the exit of Turn 7, causing significant damage to his FW48 and ending his session prematurely. With little time for repairs ahead of Sprint Qualifying, the team faced a race against the clock. The delay was substantial enough that the session was extended by a further 15 minutes.

Ocon’s Crash Brings Final Stoppage

As the clock wound down, Esteban Ocon provided the final drama of the afternoon. The Haas driver spun on the exit of Turn 4 and collided head-on with the barrier, destroying the nose of his VF-26. The Frenchman was unhurt, but the debris littering the track necessitated a third red flag.

When the session resumed for its final moments, Ocon was noted for passing a red light at the end of the pit lane — adding a potential post-session investigation to his list of concerns. The stoppage left most drivers with limited time to complete their programmes, forcing teams to prioritise data gathering over lap time improvement.

Early Issues for Alpine and Racing Bulls

Franco Colapinto’s session ended almost before it began. The Argentinean reported over the radio that “my throttle is not working” within the opening five minutes, forcing Alpine to investigate an electrical issue on the power unit. He failed to set a representative time and finished at the foot of the timing screens.

Lawson’s mechanical failure compounded a difficult start to the weekend for Racing Bulls, though team-mate Arvid Lindblad impressed by placing eighth fastest — a strong showing from the rookie in a session where experience might have been expected to prevail.

Championship Context

Antonelli’s dominance in practice comes at a pivotal moment in the 2026 championship battle. The 19-year-old, who claimed his maiden grand prix victory in China earlier this season, has established himself as the standout performer of the new regulatory era. His 20-point advantage over Russell reflects both his raw pace and a consistency that has eluded some of his more experienced rivals.

With Sprint Qualifying and the Sprint Race both taking place on Friday, teams had just one hour to dial in their setups before competitive action began. The disrupted nature of the session means there is still significant uncertainty about the true pecking order — but Mercedes’ advantage appears genuine, and Antonelli’s form looks ominous for the rest of the weekend.

The Circuit Gilles Villeneuve has historically rewarded confidence and precision. On today’s evidence, Antonelli possesses both in abundance.