Eliaquim Mangala's former agent is frustrated seeing him struggle in England.
Ferrari told Tribalfootball.com: "I just don't know: I'd hoped maybe this change could help him.
"He still has to find the right place (team) to express all the good things he showed back when he used to play for Porto."
Mangala, meanwhile, reported last night that his knee op had been successful, with hope he could yet get back for Everton before the end of this season.
He posted to social media: "Operation done.
"Now, let's get to work, to come back #EverStronger. 'Why do we fall? So we can learn to pick ourselves up.' #BatManga'".