McLaren turn up at the Singapore Grand Prix with serious concerns after a troubled stretch of races. Team principal Andrea Stella confirmed the MCL40 lost performance following recent development work, and the team accepted responsibility for a persistent issue affecting Lando Norris.

Norris called out a straight-line speed deficit as seriously damaging and said he was not confident the team could resolve the issue before Marina Bay.

A tyre strategy call during the Malaysian Grand Prix, which saw Oscar Piastri pitted under questionable timing, was later characterised by the team as an outright mistake. Singapore's narrow, technical layout is considered a bad match for the car in its present state, heaping more stress on McLaren heading into the race weekend.