Since March 29 and the Japanese Grand Prix, all 11 paddock teams have been working relentlessly at their factories. No mandatory shutdowns, no restrictions: five weeks of free development on cars that are still very new and very complex. This is the longest mid-season gap since the first two races of 1999. And in that environment, every team has done its own calculations.

The 2026 Miami GP is the fourth race weekend of the season, the second in Sprint format. But the forced pause gives it a unique character. It is the first full-scale test of all those weeks of work, and also the first real verdict on the regulatory modifications introduced by the FIA. Five questions will shape this weekend.

Kimi Antonelli arrives in Miami with a status no driver his age has ever held: championship leader after two consecutive wins. The Bologna-born driver won in China, becoming the second youngest Grand Prix winner in history. He then followed it up with victory in Japan to become F1's youngest-ever championship leader.

What stands out about Antonelli's progression is his consistency across varied conditions. His performances in Miami last year are telling: at the 2025 Miami GP, he set the fastest time in Sprint Qualifying and finished third in the main qualifying session, just 0.067 seconds off pole position. Antonelli knows this circuit. He loves it. And he arrives in complete confidence.

Russell Lying in Wait

The real tension this weekend will not be between Mercedes and its rivals. It will be between the two Silver Arrows drivers. George Russell, tagged as the favourite before the season, watches his team-mate pull ahead with a displayed serenity. But nobody genuinely believes the Briton will let himself be dropped without fighting back. Jenson Button is categorical: Russell will not crack. The internal Mercedes battle promises to be one of the most fascinating spectacles of the Miami weekend.

Miami 2026 will be as much a Grand Prix for engineers as for drivers. Every team arrives with development packages prepared during the five weeks of pause. The expected upgrade level is exceptional, precisely because teams had planned their first major evolutions for Bahrain and Saudi Arabia, two cancelled events. All that work arrives at once in Miami.

There is an image that has been circulating in the paddock for several days. Lewis Hamilton, smiling, relaxed, visibly happy driving. For the first time since 2021 according to observers, the seven-time world champion is flourishing in his car. The Scuderia has given him back something Mercedes could no longer offer: the raw pleasure of driving a racing car without the pressure of immediately having to be the best.

Hamilton has taken two podiums from three races. So has Leclerc. But Ferrari has not yet found the pace to fight for victory. Vasseur knows it, and that is precisely why the Miami upgrade package is considered the decisive moment of their season opening. If Ferrari leaves Miami capable of fighting for pole and the win, the championship changes its face entirely.

Red Bull's situation before Miami is both encouraging and complex. On the engine side, the surprise is total: the new Red Bull-Ford power unit, developed in-house for the first time, has proven a genuine revelation in terms of reliability and performance. Nobody had anticipated that this fledgling partnership would be this strong in its first season.

But the chassis remains underdeveloped and difficult to balance. Verstappen and Hadjar are struggling to find a setup that gives them competitiveness over a single lap. Red Bull is currently sixth in the constructors' championship with just 16 points, 119 off Mercedes leaders.

Lambiase's Replacement Arrives from Ferrari

The paddock learned this week that Red Bull has found its new technical director in the form of an engineer poached from Ferrari. This accelerated transfer, effective quickly, directly addresses the void left by Lambiase's departure to McLaren. For Verstappen, who needs stable reference points in his working environment, quickly having a new technical anchor is crucial.

McLaren is the great paradox of this 2026 season start. The team that won the double world title in 2025 with Piastri and Norris had a difficult opening. That is not entirely surprising: McLaren had pushed its development very hard right up to the last race of last year, at the expense of an optimal transition to the new regulation.

But the five-week pause was their best ally. Andrea Stella is clear: Miami and Canada will see a near entirely new MCL40. For Norris and Piastri, who are patiently defending their title, the wake-up call could be brutal for their opponents.

• Cadillac at home: first home race for the new American team. Colton Herta is also racing in F2 this weekend, a double celebration for the local fans.
• Sprint format: Sprint weekend with 90 minutes of free practice instead of 60, to allow adaptation to the new regulation. Sprint Qualifying on Friday evening.
• Adjusted regulation: first real-world test of the 350 kW super clipping, the 7 MJ qualifying harvest limit and the start detection system.
• Florida weather: glorious sunshine expected, between 32 and 35°C. Ideal conditions to measure the performance of new parts.