Formula One boss Bernie Ecclestone suffered a head injury when muggers attacked him and escaped with jewellery worth £200,000.
The 80-year-old F1 supremo was robbed outside the headquarters of his business empire Formula One Holdings, in Knightsbridge, central London, Scotland Yard said.
Billionaire Mr Ecclestone was reportedly punched and kicked by four men who were lying in wait as he arrived at the HQ with his Brazilian girlfriend Fabiana Flosi.
A Scotland Yard spokesman said: "Police were called at about 10.30pm on Wednesday November 24 to reports of a man and a woman robbed on Princes Gate.
"The man was taken to a west London hospital for treatment to a minor head injury and was subsequently discharged. There were no reports of any other injuries.
"Officers from Westminster robbery squad are investigating. There have been no arrests and inquiries continue.
"The items stolen are believed to be a quantity of jewellery."