Azerbaijan GP FP1: The Smoking Mercedes and Why the Timing Order Doesn't Tell the Whole Story

The Mercedes W17 of Andrea Kimi Antonelli was smoking when it came to a stop at the side of the Baku circuit. That was the image I noted in my pad before I even looked up at the timing screen. In a first practice session, smoke from the power unit stays with you longer than a thousandth of a second.

George Russell ended FP1 with a 1m45.387s. Max Verstappen, as usual, was just 0.400s behind at 1m45.787s. Charles Leclerc was marginally further back, 0.404s. Antonelli — in the same garage as Russell — finished fifth. Lando Norris, over at McLaren, was stranded in fourteenth without a single genuinely representative soft-tyre lap.

That timing sheet will be tomorrow's headline in most outlets. To me, it is only the cover of a dossier whose most important pages sit at the back.

Context: a circuit that gives no clean data

Baku is a street track used only once a year. The surface is dusty at the start of a session, grip is low, and rubber builds up only gradually, lap by lap. This is the kind of circuit where track evolution alone can produce a larger gap than an entire upgrade package.

When I covered training sessions in the Bundesliga years ago, the first lesson was always that data is only trustworthy when the measurement conditions are stable. In Baku, the conditions are anything but stable. A driver setting a fast lap twenty minutes from the end is running on a rubbered-in surface; someone running earlier is not.

The session split into two clear phases. The first was baseline running on hard tyres, with Verstappen setting a 1m46.6s marker. The second, roughly the final twenty minutes, saw teams switch to softs for comparison runs. That is standard FP1 protocol: establish a baseline on a dirty track, then exploit the rubbered-in surface for representative soft runs.

The consequence is clear. The late fast laps are flattered relative to earlier times. They are quicker not necessarily because the car is better, but because the track is better. The 0.4s gap between Russell and Verstappen sits well inside the noise generated by rubber build-up and soft-tyre timing. It is not yet a reliable performance delta.

Worse, several drivers never completed a clean soft-tyre lap. Arvid Lindblad got out of shape at Turn 7, thwarting improvements for several drivers. A car stopped and a second VSC was deployed. The result is that the timing order is not a complete data set but an incomplete one. Norris in fourteenth is the proof: he had no representative lap to say anything with.

The core: what the upgrades say about each team's direction

McLaren brought to Baku a package of new sidepods, a new floor edge and a revised diffuser. Three components, one target: addressing a low-speed weakness. That is the most technically significant detail of the whole session.

A team usually copies someone else's concept when it is stuck. McLaren has instead circled its own pain point. That signals its aerodynamicists have a clear correlation model — they know exactly where and why they are losing time. Whether the package works remains unproven, and the slow castling section around Turns 8 to 15 will be the most brutal test.

Williams brought the most structurally telling detail: a redesigned floor and a lighter chassis, packaged together. Introducing a lighter chassis suggests Williams has been fighting an overweight-car handicap for a long time. Excess weight suppresses performance in every corner and compounds tyre degradation. A lighter chassis typically delivers a broad, circuit-independent gain — unlike a floor that only helps in certain operating regimes.

Audi also brought an upgrade. That matters, because it shows a team in performance-searching mode rather than defensive mode.

But the true technical story of the session was not pace. It was reliability. Two power-unit-related failures — Antonelli's smoking W17 and Hadjar's engine problems — plus a brake complaint on Verstappen's RB22 form a pattern. That is the sign of systemic component stress.

Smoke from a car that stops suddenly almost always points to the power unit or the ERS: oil, thermal, or coolant. That carries a component-quota consequence. If Mercedes has to change a unit, they face a grid penalty. With the season entering its decisive phase, that is a far higher price than half a second in an FP1 session.

The fact that both a Mercedes and a Red Bull — different power-unit suppliers — suffered power-unit problems suggests 2026-spec units are still fragile early in the regulation cycle. That is a paddock-wide risk, not a single team's issue.

The cleanest signal of the whole session, though, was the intra-team gap. Russell first, Antonelli fifth, in the same car. Even accounting for Antonelli's truncated running, that gap means more than any cross-team comparison, because it is the only near-controlled comparison available.

The contrarian angle

There is a habit I have learned to be wary of after years of reading reports that are too smooth: when every number looks neat and rounded, that is often precisely when something is being hidden. The Baku FP1 report has a too-clean look about it: Russell first, Verstappen close behind, Leclerc just after. A story so tidy it is easy to believe.

But a reliability record does not lie — only the people reading it know how to bury the truth. And the truth here is that the timing order is being over-read. The media will spend all day comparing the 0.4s gap, while the most interesting data — two power-unit failures, a brake issue, and an unproven upgrade package — sits at the bottom of a press release.

I have myself been challenged on whether people who read data like me have the standing to draw conclusions. An assistant coach once shouted that women do not understand strategy. I did not argue. I waited for the numbers to be confirmed. Data has no gender. Only the person reading the data carries a bias.

In Baku, the most common bias is the belief that an FP1 session can establish the true performance order. It cannot. It can only establish a temporary timing order on a surface that is still changing.

One more layer. McLaren publicly naming its low-speed weakness implies that under the new cycle its advantage lies in high-speed and medium-speed efficiency, while it bleeds time in slow corners. That is a car-character split that predicts specific circuit vulnerability: Singapore, Baku, Monaco. And Baku, today, is one of them.

Another possibility worth weighing: the brake overheating Williams encountered may be a side-effect of the lighter chassis. Reduced mass changes brake cooling load and aerodynamic ducting balance. A new package frequently brings thermal side-issues before they are tuned out. If so, it is a small price for a large gain.

When the dressing-room door closes, I understand that strategy is not on the whiteboard. It is in which team understands its own weakness best, and which team is merely covering it with a fast lap at the exact moment the track has rubber.

Forward-looking

What I carry away from the Baku afternoon is not the name at the top of the timing sheet. It is the list of unanswered questions: whether McLaren's package survives the slow-corner test, whether Williams' lighter chassis offsets its thermal issue, and whether that run of power-unit failures is an accident or a pattern still forming.

I do not trust a reliability report before I understand the pressure bearing down on the signature below it. For teams racing through the decisive phase of a season, every time a car smokes, they spend from their component-quota reserve. The question is not whether tomorrow's FP2 confirms that 0.4s gap. The question is whether the Mercedes, the Red Bull, and every other power unit on the grid can hold together until the season ends.