Mercedes on top again as Aston Martin breaks cover on Day Four of F1 test

Mercedes reportedly ended Day Four of Formula 1‘s Barcelona pre-season test on top, with George Russell fastest ahead of team-mate Andrea Kimi Antonelli.

The Italian allegedly set the fastest time of the morning, and completed another mammoth run, with 90 laps of the Circuit de-Barcelona Catalunya.

Russell took over in the afternoon, and after an apparent 78 laps, reportedly bettered Antonelli’s time by around sixth tenths.

Charles Leclerc was third, completing 83, four less than team-mate Lewis Hamilton, who was sixth overall.

But perhaps the biggest story of the day was the eagerly-anticipated debut of the Aston Martin AMR26, which broke covers for the first time, with Lance Stroll at the wheel.

The Canadian was released onto the circuit late in the day, after a morning spent by the team constructing the Adrian Newey-designed machine.

An exploratory cameo was halted when the car came to a halt towards the end of the sixth lap, with Stroll climbing out.

As always, all the information from the test is information sourced from the circuit and is subject to confirmation.

View the unofficial Day Four testing results here!

Position	Driver	Team	Time	Laps
1	George Russell	Mercedes	1:16.455	78
2	Kimi Antonelli	Mercedes	1:17.081	90
3	Charles Leclerc	Ferrari	1:18.223	83
4	Oscar Piastri	McLaren	1:18.419	48
5	Arvid Lindblad	Racing Bulls	1:18.451	47
6	Lewis Hamilton	Ferrari	1:18.654	87
7	Liam Lawson	Racing Bulls	1:18.840	64
8	Sergio Perez	Cadillac	1:21.024	66
9	Lance Stroll	Aston Martin	1:46.404	5