George Russell has admitted he was caught off guard by the sheer scale of the performance leap both McLaren and Ferrari managed to pull off during the Miami Grand Prix weekend—a development that has shaken up the early dominance of the Formula 1 season.

After Mercedes swept the opening three rounds, claiming every pole position and race victory, the tide turned dramatically in South Florida. Lando Norris stormed to sprint race pole in his upgraded McLaren, outpacing Russell's Mercedes teammate Kimi Antonelli by a solid 0.222 seconds. With Oscar Piastri slotting into third for McLaren and Charles Leclerc taking fourth for Ferrari—plus Max Verstappen rounding out the top five for Red Bull—Russell found himself pushed back to sixth, a hefty 0.624 seconds off Norris's blistering pace.

"Pretty surprising how big a jump McLaren and Ferrari have made," Russell confessed after sprint qualifying. "That's pretty damn impressive. We knew they'd probably close the gap, but they've been quicker than us."

Both rival teams arrived at the Miami International Autodrome with major upgrade packages, while Mercedes stuck to a more modest development schedule as part of its long-term plan. The Silver Arrows had braced for some progress from their competitors, but the scale of the gains clearly exceeded expectations.

Russell also pointed to a personal struggle during the session, citing tyre overheating through the slow-speed middle sector of the track. "My side, I have been struggling today. Miami's not a track that I love to be honest, especially in these hotter conditions," he explained. "I was just overheating my tyres a lot in that twisty section in the middle, struggling to get the right balance with the car."

Still, the British driver remains pragmatic about the challenge ahead. "It's only sprint qualifying, so let's see what tomorrow brings. Not much more to say than that really. As I said, just quite surprised by the progress of the others, but another day tomorrow."

With McLaren's 'new car' upgrade raising hopes of a genuine title fight and Ferrari also finding pace, the Miami GP has already delivered a dramatic shift in the competitive order. For Mercedes, the message is clear: the honeymoon period is over, and the battle for supremacy is just getting started.