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Sepang Friday leaves F1 grid facing an unpredictable weekend
Severe tyre degradation, an aggressive track surface and looming weather threats created a profoundly confusing opening day of practice in Sepang.
By Patrick Koster - 2026-10-02T14:29:39.000Z - 3 min read
Formula 1 teams faced a uniquely complex challenge during Friday practice at Sepang as a combination of extreme heat, severe tyre degradation and an aging asphalt surface threw conventional preparation out of the window. Drivers and engineers spent the opening sessions untangling a web of contradictory data while trying to master a circuit that has not hosted a grand prix in nearly a decade. Paddock consensus pointed to a weekend defined by compromise, with teams forced to weigh the demands of a single fast qualifying lap against the brutal realities of race stints.
Mercedes experienced a difficult start as the team worked to evaluate its first major upgrade package since May. A superficial look at the timesheets placed the squad behind its usual rivals, though neither Kimi Antonelli nor George Russell managed a clean run on soft tyres during the second session. Russell noted that handling balance and tyre temperature struggles were the primary limitations rather than any fundamental flaw in the new parts. Trackside engineering director Andrew Shovlin confirmed that while single-lap pace could be easily addressed, solving an unusual long-run deficit remained the more pressing concern for the team.
At the front of the field, Max Verstappen set the benchmark with the fastest single-lap time of the day during the opening session for Red Bull. Rival teams observed that the Red Bull package appeared unexpectedly competitive in high-speed corners where McLaren had previously held the advantage. Meanwhile, McLaren worked through its own programme, successfully gathering valuable data on a high-downforce rear wing configuration. Lando Norris and Oscar Piastri completed encouraging long runs that suggested the team would be heavily involved in the fight at the front once strategy and track evolution settled into a predictable pattern.
Tyre supplier Pirelli highlighted an unusual strategic dilemma regarding degradation and compound selection. High surface roughness and low grip levels caused severe sliding, leading to the counter-intuitive observation that softer compounds occasionally displayed more stable degradation characteristics than the harder tyres. Pirelli representative Simone Berra explained that teams might intentionally compromise their qualifying setups by dialing in understeer to protect rear tyres during long race stints. This tactical trade-off threatened to shuffle the qualifying order and create unexpected performance swings when the lights went out.
Compounding the technical puzzle was the rapid break-up of the Sepang asphalt, which left cars roughly four and a half seconds slower than pre-weekend simulations predicted. Drivers reported an extremely aggressive track surface that continuously dragged loose stones onto the racing line whenever cars drifted wide. The FIA intervened by deploying sweepers after each session to clear the debris, though the lack of rubber-laying and persistent surface roughness meant grip levels remained entirely unpredictable. Pirelli confirmed that no structural safety concerns existed despite the visible tarmac deterioration across the venue.
Adding a final layer of volatility to the weekend, the persistent threat of tropical rain hung over the paddock after storm clouds narrowly missed the circuit during Friday afternoon running. Weather interruptions during either qualifying or the grand prix threatened to render meticulous setup work obsolete while forcing teams to rely on limited wet-weather experience. With multiple variables colliding on an unfamiliar circuit, the grid prepared for an exceptionally volatile weekend where adaptability would matter more than pre-session simulations.