The former Blues boss, who won the Champions League during his time with the club, failed to reach a settlement with Roman Abramovich when departing the Premier League giants one year ago.
And, it has now been reported that the Italian will continue to pick up the mega salary until June of 2014 which will add to the £7 million he has already made from the club.
Di Matteo has yet to return to management since leaving the Stamford Bridge outfit as it's unlikely he will receive a similar pay-packet.
However a number of clubs have been interested in the former Blues boss, with Fulham the latest club linked with a move for his services.
The struggling Premier League side could axe Martin Jol as the pressure continues to mount on the 57-year-old at Craven Cottage. However it's not yet known as to whether Di Matteo would be willing to take the job at the club.