The midfielder believes Di Matteo has gone back to basics with the Londoners, playing the high-tempo, long-ball game which made them so successful over the past decade.
And he insists Chelsea are a far more dangerous outfit playing that way, rather than the continental approach ex-manager Andre Villas-Boas tried to introduce.
‘With Villas-Boas, they tried to control the ball, they wanted to take the initiative,‘ said Fabregas, ahead of the Champions League semi-final, first leg.
‘Now they are back to a style which made them great, which made them win the Premier League.
‘They play long balls now, everyone in the area, everyone going forward when they have the ball. With players like Didier Drogba, they are a very dangerous side.‘
The former Arsenal man also aimed a thinly veiled barb at old boss Arsene Wenger, insisting he is a far better player now he has left.
‘I have learned so much, especially at a tactical level,’ he said.
‘I position myself much better on the pitch. I was not very good tactically, I simply played wherever I wanted.’