The rumour, however, appears to have little substance, as the former Blackburn Rovers man is ready to fight for his place in Jose Mourinho's star-studded squad next season.
Duff's agent Pat Devlin, speaking to the BBC, said: "It's nonsense to suggest he wants to go back to the north-west, there's no way he wants to leave.
"Damien has just recovered from a bad shoulder injury and isn't thinking about anything but playing for Chelsea."