Mercedes' Kimi Antonelli caught and passed Lewis Hamilton to win an action-packed sprint race at the British Grand Prix.
While McLaren's Lando Norris, Mercedes' George Russell and Red Bull's Max Verstappen staged a frantic place-swapping scrap in the opening laps at Silverstone, Antonelli bided his time before homing in on Hamilton at the front.
The 19-year-old Italian let the race settle down before remorselessly homing in on the Ferrari and blasting past Hamilton on the Hangar Straight on lap eight after strategically saving his battery charge.
He made one attempt at Brooklands corner at the end of the Wellington Straight only to be rebuffed, before blasting past Hamilton on the Hangar Straight on lap eight after strategically saving his battery charge.
Hamilton hung on bravely but could do nothing to stop Antonelli extending his championship lead still further to 43 points over Russell.
"It was a very fun first 10 laps with Lewis," Antonelli said. "We were both pushing very hard. When I got into overtake (mode), I knew my chance was coming.
"When I got alongside in Brooklands he used the boost and I decided to wait and then I got close and used everything."
Hamilton said: "Tough race to keep the Mercedes behind, as I said it might be. And with it being so windy today, big headwind down the back straight, he came flying past. We have work to do to try and close that gap as we can keep up."
Behind them, Norris drove an excellent race to blast up from sixth on the grid to fourth on the first lap before passing Russell on the second lap.
There were a few hectic laps as Norris, Russell and Verstappen swapped places before Norris managed to consolidate third place and move clear of the the battle behind him.
"It was a very good race," the world champion said. "I'm very, very happy, good start, good first lap, not the pace to go with these guys but had a good battle with George. Pleasantly surprised."
Russell managed to pass Verstappen on lap nine before the four-time champion fell back into the clutches of Ferrari's Charles Leclerc, who moved past the Red Bull a lap later.
Verstappen dropped back but managed to hold off McLaren's Oscar Piastri to take sixth.
Racing Bull's Liam Lawson held off an attack from Red Bull's Isack Hadjar in the closing laps as they took the final points positions.
Qualifying for Sunday's main grand prix is at 16:00 BST on Saturday.