Red Bull team principal Christian Horner has heaped pressure on Formula One's governing body to sanction Sebastian Vettel for his expletive-laden outburst during the Mexican Grand Prix.
The Ferrari driver told race director Charlie Whiting to "f*** off" over the team radio as he lost his cool while fighting Red Bull's Max Verstappen for position in the closing stages.
Vettel apologised to Whiting following the conclusion of the race, but Horner believes the FIA should take action against his former driver.
He says in any sport you can't abuse officials, so he'd be surprised if Vettel isn't reprimanded.
The FIA could choose to fine the Ferrari driver, or at the very worse, suspend him from the next race in Brazil.