Milan striker Zlatan Ibrahimovic is expected to follow the Brazilian to the Paris club this week.
"Milan are a serious outfit," Paulo Tonietto told TMW on Tuesday. "With or without Thiago Silva, as well as any other player, they will not stop being a great club. They have great fans and great directors.
"I would like to thank Milan myself and on behalf of Thiago - they will always remain in our heart.