Capello took aim at former Manchester United boss Ferguson and ex-Arsenal manager Wenger in an odd outburst as he talked up Jose Mourinho, who will replace Paulo Fonseca at the end of the season.
The 74-year-old, who managed Roma from 1999 to 2004, says he was let down by his old team this season and believes Mourinho can change the fortunes at I Giallorossi.
"I was let down by the two Roman clubs this season. Lazio have a very good squad, but were terribly inconsistent. More or less the same is true of Roma," said the ex-England manager, via Football Italia.
"These are teams who can really put in a great performance, but only do it sometimes. They've got quality players and Roma managed to do well enough even without Nicolo Zaniolo, who might've made the difference.
"Paulo Fonseca still put together a side that was largely good to watch."
On the Portuguese, he added: "I have always been a Mourinho supporter. He has clear ideas, creates a team spirit and is able to drag everything out of the players. He has the result in his mind.
"Roma are a very difficult club to work in, and I know that too well, so I can only wish Mourinho all the best. And that's all I'll say."
Capello also claims Ferguson did NOT coach his Man United team and says he was "completely isolated" from everyday work in training.
He continued: "Let's just put to one side the stories of England and Ferguson. The truth is that Ferguson didn't coach that team, he just went to watch training sessions a couple of times a week and left everything else in the hands of his staff.
"Then he would arrive, talk, decide and they'd follow him. He was completely isolated from the everyday work of the training ground, though.
"The same goes for Arsene Wenger at Arsenal. In Italy, the way you coach a team is completely different and after five years, a coach has very little left to say."
Featured Image Credit: PA
- Sir Alex Ferguson's passionate and honest speech on failure is 'the best you'll hear', it's gone viral
- Manchester United Legend 'Didn't Appreciate' Sir Alex Ferguson's Brutal Transfer Decision
- Sir Alex Ferguson's 'Worst Ever Signing' Bought Himself Out Of Contract To Seal Manchester United Deal
- Sir Alex Ferguson's 'Most Disappointing Signing' Talks About Moving To Manchester United