Leclerc Tops Miami Practice in Upgraded Ferrari as Mercedes Hit Trouble

Charles Leclerc set the fastest time in Miami Grand Prix practice, signaling a potential boost for Ferrari after introducing major upgrades. His pace outpaced Red Bull's Max Verstappen by nearly three-tenths, while Mercedes faced reliability concerns with both cars, casting doubt on their recent dominance heading into Sprint Qualifying.

Why it matters:

The session suggests the development race during the five-week break may have shifted the competitive order. Ferrari's significant upgrade package appears to have delivered immediate performance, while Mercedes, which has brought the fewest updates of the top teams, now faces both a performance deficit and technical headaches that could compromise their unbeaten 2026 start.

The details:

• Leclerc's Ferrari, featuring 11 new parts including a revised floor and suspension, was quickest on two separate lap times, showing strong cornering performance with added downforce.
• Mercedes drivers Lewis Hamilton and George Russell finished fourth and sixth, respectively, trailing the pace by nearly half a second and eight-tenths.
• Mercedes' Reliability Woes: The team's primary concern is a power unit issue. Russell reported a strange "steam engine" noise from the turbo, and teammate Andrea Kimi Antonelli was unable to complete a soft-tire run due to a separate PU problem.
• McLaren's Strong Showing: Oscar Piastri was third, but Lando Norris appeared even more competitive, likely challenging Leclerc's time if not for traffic and a near-miss with Alex Albon's Williams.
• Red Bull's Focus: Team principal Laurent Mekies stated the session was primarily for internal assessment, noting efforts to fix issues that previously prevented Max Verstappen from pushing the car to its limit in China and Japan.

What's next:

All eyes turn to Friday night's Sprint Qualifying to see if the practice trends hold under competitive conditions.

• Ferrari will aim to confirm their upgrade pace translates into a genuine qualifying threat.
• Mercedes must urgently diagnose and resolve their power unit issues to defend their perfect season record.
• McLaren and Red Bull, both with substantial updates of their own, will look to disrupt any emerging Ferrari advantage and challenge at the front of the grid.