Mercedes Edge Day 4 in Barcelona as Russell Leads F1 Pre-Season
Mercedes dominated Day 4 of the 2026 Barcelona pre-season test, with George Russell fastest in 1:16.445 after taking the W17 for a long run (77 laps). Teammate Kimi Antonelli was 1:17.081 in the morning, while Charles Leclerc and Lewis Hamilton led the 1:18s group for Ferrari as they logged about 174 laps combined. Oscar Piastri’s McLaren ran 48 laps before a fuel-system issue cut afternoon running, and Aston Martin’s Lance Stroll completed four exploratory laps. Across three days Mercedes have racked up 499 laps.