The centre-back has condemned a national newspaper for picking out a criticism of Di Canio from the 34-year-old's 2007 autobiography.
The former Swindon Town boss, who has been accused of being a fascist, was branded "an absolute idiot" by Ferdinand in his book for making a fascist salute.
Ferdinand wrote on Twitter: "Why has a paper brought out a quote from years ago to try and derail Di Canio?? Lazy journalism again. I wish him good luck in the PL. Simple."
Meanwhile, Di Canio has denied having fascist beliefs.