Mercedes Dominates Again as Russell Tops Final Barcelona Test Day

Mercedes completed its pre-season shakedown with another commanding 1-2 finish on the timing sheets in Barcelona, as George Russell set the fastest lap of the week. The team's final day of permitted running was marked by high mileage and pace, though the true competitive picture remains obscured by unknown fuel loads and run plans across the grid.

Why it matters:

Pre-season testing times are notoriously unreliable indicators of true performance, but consistent patterns of speed and reliability are telling. Mercedes' ability to log significant mileage while topping the times for two consecutive days signals a car that is both fast and robust out of the box—a critical foundation for the season ahead. For rivals, the gaps, however unofficial, provide an early benchmark and highlight areas needing immediate attention before the competitive season begins.

The details:

• George Russell set the week's benchmark with a 1:16.445 during 78 laps in the afternoon, leading a Mercedes 1-2 over teammate Kimi Antonelli.
• Mercedes accumulated 168 laps on the day, adding to a massive 180 from Wednesday, demonstrating strong early reliability.
• Ferrari's Charles Leclerc was third fastest but 1.7 seconds adrift, though the Scuderia's power units completed the most laps (236) on the day across its works and customer teams.
• McLaren's running was compromised by a fuel supply issue on Oscar Piastri's car, limiting him to 48 laps.
• The Aston Martin AMR26 made its track debut with Lance Stroll completing a handful of installation laps, marking the first appearance of Adrian Newey's new design with the Honda power unit.

What's next:

The Barcelona shakedown is now complete, with teams packing up for the official pre-season test in Bahrain. The data gathered here on car systems, reliability, and driver feel is invaluable, but the desert circuit will provide the first true, comparable glimpse of 2026 pecking order under more controlled conditions. The focus now shifts to analyzing this data, making final adjustments, and preparing for the intense three-day test in Sakhir that sets the stage for the season opener.