Tevez and the rest of the Citizens will host the Red Devils at the City of Manchester Stadium on Saturday in a critical derby match.
The Argentine international has enjoyed a fantastic season for the Citizens, currently tied with Sunderland’s Darren Bent for third most Premier League goals this season with 22.
With a brace on Sunday against Birmingham, Tevez has scored six goals in his last three league games.
The 26-year-old striker shows limitless effort while on the pitch, and no one questions his tenacity, but Ferdinand has revealed that Tevez’s energy comes from a lack of effort in training.
"Carlos is an interesting character. When he was at United, he saved all his energy for the games - he didn't really go over the top at training,” Ferdinand told The Sun.
"He worked hard in the gym - he was a professional in that sense - but everything he did was geared towards the match at the weekend.
"You could see him conserving his energy during the week and then laying it all on the line out on the pitch.
"That's not the way I operate, I have to train at a high level every day. But it works for Carlos and he can be a real handful to defend against."Become a fan of Goal.com USA's Facebook fan page for all the latest news and insight into everything related to the beautiful game