The Formula One boss Bernie Ecclestone suffered a head injury when he was mugged in central London, just weeks after suggesting the city's streets were more violent than those of Brazil.
The 80-year-old billionaire was kicked and punched by his attackers before they escaped with about 200,000 pounds ($416,220) worth of jewellery.
Four men were waiting for him and his Brazilian girlfriend as they arrived at the headquarters of his business, Formula One Holdings, in Knightsbridge, central London, on Wednesday evening local time.
The offices are near Buckingham Palace and within walking distance of Oxford Street, one of the capital's busiest shopping thoroughfares.
Earlier this month, Ecclestone had said it was surprising the number of people who got mugged hourly in Oxford Street.
He was responding to the attempted carjacking of Britain's former Formula One champion Jenson Button whose trained undercover police driver had to swerve his way out of a traffic jam after gunmen approached their stationary armoured car ahead of the Sao Paulo race.
Scotland Yard said Ecclestone was taken to a west London hospital for treatment and was later discharged.