Red Bull’s alternator problems return

Red Bull’s alternator problems are back.

Sebastian Vettel’s car broke down in the final practice session at Monza on Saturday morning.

He radioed the pits that the problem was battery-related.

"It’s the same problem as Valencia," Dr Helmut Marko told Germany’s Auto Bild Motorsport.

At Valencia, the Renault/Magneti Marelli alternator failed, costing Vettel victory, while a similar problem also struck Romain Grosjean’s similarly-powered Lotus.