Mercedes will probably need "several months" to find out Russell's issue in Montreal

Mercedes departed the Canadian Grand Prix with mixed emotions. Andrea Kimi Antonelli claimed his fourth consecutive victory, extending his championship lead, while George Russell retired from a commanding position due to a technical failure that left the team searching for answers.

Trackside Engineering Director Andrew Shovlin summarised the mood succinctly, describing the weekend as one of “mixed feelings,” praising the team’s pace but acknowledging the heavy cost of Russell’s retirement.

Russell started from pole but suffered a slow launch, losing out to both Antonelli and Lando Norris. Once Norris pitted early, Antonelli was released into clean air — but Russell quickly fought back, retaking the lead and setting up one of the most intense intra‑team battles of the season.

Both Mercedes drivers pushed to the limit. They locked up, ran wide, went side‑by‑side and came close to contact multiple times, yet the fight remained clean, controlled and respectful. Antonelli appeared marginally faster, while Russell was tidier and more precise, and the lead changed hands repeatedly as the pair traded blows.

The duel looked set to continue until the final laps — until Russell suddenly slowed, pulled off the track and climbed out of the car, visibly furious as he struck the cockpit in disbelief.

Mercedes later confirmed that the issue originated in the battery pack. The team’s senior technical leadership provided a detailed explanation of the failure and the unusual procedures that followed.

According to the engineering debrief: “It was an engine kill that was caused by a failure in the battery, which just suffered a catastrophic failure a third of the way into the race and brought George’s race to an end there.”

Once the car was recovered, the team began the process of isolating and removing the damaged module: “We got the car back and were able to get the module out of it. It had to undergo some unusual safety procedures and then has to be shipped back actually to the UK.”

The investigation will take time, with the hardware unavailable for several months: “So it will therefore be several months before the hardware gets back and we need to really dig through the data to understand exactly what went wrong and then work out how we try and prevent a repeat on any of the other modules in the future.”

The failure not only cost Russell a likely victory but also widened Antonelli’s championship advantage to 43 points.