P1racenews AI automatic summary:
Check out the results from the fourth day at the Barcelona shakedown!
George Russell demonstrated Mercedes’ dominance in pre-season testing at Barcelona by recording the fastest time of the week so far.
Kimi Antonelli set the pace in the morning session with a lap of 1:17.081s, while Russell broke into the 1:16s in the afternoon, clocking a time of 1:16.445s.
Mercedes continued their impressive performance by completing a total of 499 laps over three days of testing.
Oscar Piastri was the fourth fastest in his McLaren, albeit facing a fuel system issue that limited his running to the morning session.
Ferrari had a productive day of dry-weather running with Charles Leclerc and Lewis Hamilton completing a combined total of 174 laps.
Aston Martin finally joined the action with Lance Stroll putting in four exploratory laps.
For full results from Day 4, refer to the details below.






