The Blues maintained a solid defensive base during Di Matteo's time in charge last season, a unit which guided Chelsea to Champions League success.
He told the Daily Star: "There will not be radical changes. With the integration of these new players, inevitably we will change how we play a bit.
"But I never said we were going to play attacking football – we will play to try and win games."
Chelsea play their first competitive match of the 2012-13 season against Premier League champions Manchester City in the Community Shield on Sunday, August 12.