BBC Radio Five Live asked for help from a deaf lip reader, Jessica Rees, who read the words phonetically to an Italian translator.

She deciphered the insult as being “you're the son of a terrorist whore” - a translation also carried by many national newspapers in Britain on Tuesday.

The BBC's Ten O'Clock News also called in experts to study the television footage of the incident and determined the following:

Materazzi's first word to Zidane was “no” before he then told him to “calm down”.

He then accused him of being a “liar” and wished “an ugly death to you and your family” on the day the Frenchman's mother had been taken to hospital ill. This was followed by “Go f*** yourself”.

But Materazzi added: “I am ignorant, I don't even know what an Islamic terrorist is; my only terrorist is her,” he said pointing to his 10-month-old daughter.