Carlos Sainz Warns of 'Serious Issues' as Williams Development Stalls

Carlos Sainz has warned that Williams is facing "serious issues" with its 2026 development, admitting the team is losing ground despite aggressive weight reduction and new upgrades. His frustration peaked at Silverstone after slipping from 10th to 17th, insisting the gap to the front and midfield is widening rather than closing.

Why it matters:

Williams began the season roughly 20 kilograms overweight but expected rapid gains under the new regulations. Instead, Sainz has identified a troubling pattern where the car is shedding weight without finding lap time, suggesting Grove is struggling to understand the current aerodynamic formula. With the team stuck eighth in the Constructors' standings on 11 points, the fear is that development resources are being misdirected at a critical phase.

The details:

• Sainz revealed the team fast-tracked a new front wing from Belgium to Silverstone, though the Sprint format offered almost no running to evaluate it.
• He offered a stark comparison: at Suzuka the car trailed by 1.6 to 1.8 seconds while overweight, yet at Silverstone it was two seconds off after major weight savings, pointing to missing downforce or flawed flow dynamics.
• Neither Sainz nor teammate Alex Albon has scored consistently since June, with a repeating pattern of strong starts followed by race-day fade.

What's next:

Williams now faces an urgent factory review to locate the missing performance. The team must determine whether it has fundamentally misread the 2026 regulations or if correlation issues are masking progress, because the current slide risks cementing it at the back of the midfield. Sainz vowed to help Grove find answers, but the window to turn the season around is narrowing quickly.