Mercedes is left puzzled after its 2026 upgrade underperforms in Singapore’s Sprint. A split-spec plan sees George Russell second in the older car, Andrea Kimi Antonelli seventh with updates.

The objective is clear: run both specifications to isolate why the revised aerodynamic package fails to deliver. Instead, side-by-side evidence shows the baseline car is faster on the street circuit.

Trackside engineering director Andrew Shovlin highlights Singapore’s difficulty for correlation. The compressed Sprint format restricts setup exploration and magnifies small balance errors across braking zones and traction phases.

Antonelli struggles most on braking and corner entry, particularly in tighter sections. The upgraded car proves edgy, limiting commitment and compounding time loss through sequences that reward confidence.

With parc fermé in force, mechanical changes are limited. Mercedes can only adjust software and front wing flaps, working within the strict 2026 regulations to stabilise the updated package.

The older spec’s advantage raises correlation alarms between track, wind tunnel, and CFD. Mercedes is scrutinising its models and aerodynamic upgrade assumptions to understand the shortfall.

Data from the split run underpins overnight decisions. The aim is restoring Antonelli’s braking confidence and mid-corner balance, while exploring paths outlined in plans to unlock the upgrades.

Competitive pressure in 2026 leaves little margin. Mercedes may persist with split-spec running until clear direction emerges, trading short-term grid risk for long-term development certainty.

Russell’s clean execution underscores a workable baseline window. His feedback on rotation and traction contrasts with Antonelli’s experience, informing next steps and his stance on the upgrade trajectory.

The focus now is on cause, not blame. If Mercedes restores correlation and confidence quickly, the package can rebound; if not, development direction shifts before forthcoming rounds.

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Daniel Miller

Daniel Miller reports on Formula 1 Grand Prix weekends with race-day analysis, team-radio highlights, and point-standings updates. He explains power-unit upgrades, aerodynamic developments, and driver rivalries in straightforward, SEO-friendly language for a global F1 audience.