Red Bull Racing has confirmed that it was a brake problem - rather than an issue with the engine - that slowed Sebastian Vettel down early in the Italian Grand Prix.
Vettel lost seventh position to teammate Mark Webber on lap 20 of the Monza race after slowing on the run from the Ascari Chicane to Parabolica. After seeing his pace drop, Vettel radioed to his team to say that he believed he had an engine problem,prompting fears that he would be forced to retire from the race. However, analysis of Vettel's engine telemetry by the team indicated that there was no issue with the power unit and the German recovered to finish fourth after opting for a late tyre stop.
Red Bull Racing was initially unsure about what caused the problem, but a post race analysis indicated that one of the brakes had remained locked on briefly after the Ascari chicane.