The Daily Mail says Defour should have heeded the lesson learned from Julien Escude when Ferguson was courting him.
Escude was another lift the lid on approaches in August 2002.
A spokesman for his club Rennes said they had received no offers for their Under 21 international, but Escude blabbed: "Manchester United are interested.
"I am not insensitive to their solicitations. I have had contacts with Alex Ferguson. I wanted to know what he expected from me and what he was intending.
"I have spoken about my possible departure with the Rennes managers. They know what I think. I am ambitious and I want to keep progressing."
The loose tongue saw him miss out on Old Trafford and he is now a 30-year-old who never quite hit the heights that had been promised.
Will Defour suffer the same fate?