Fabio Capello has insisted that he will not go into detail on the reasons behind his resignation.
Capello told ANSA, the national Italian news agency: "I leave England and I will not say anything else."
When asked about the quotes attributed to him by other Italian news agencies, he said they were "false".
The Italpress agency quoted Capello at length attacking the Football Association.
His son Pierfilippo said in an email: "A story on football-italia website quoting Fabio Capello is not accurate and not true.
"We will take legal actions against any further story of this nature."