While the Parisians did not want to renew his deal for months, he has revealed a last minute approach was made by the Parisian club.
Silva told Canal Football Club of his departure at PSG: "At the beginning, there was no offer to renew my contract.
"Leonardo called me, told me I wasn't a part of the club's project and said I could leave.
"After the Champions League final, he called me back and asked me if I'd signed with another club. I said no, but I'd given my word to Chelsea.
"For me, the word is the most important. Once you've said something, you have to follow through. You can't change your mind like that. And, I think they changed their mind after the Champions League because I showed my quality."