Hamilton theory dismissed as Stella insists McLaren upgrade delivered expected gains

McLaren team principal Andrea Stella has dismissed Lewis Hamilton's claim that the team's Miami Grand Prix upgrades delivered more performance than expected. Stella insisted the gains from the MCL40 updates were 'pretty much' in line with what the team's data had predicted, contradicting what Hamilton said he had heard. The dispute centres on McLaren's upgrade package introduced at the 2026 Miami Grand Prix.