The Spaniard gave the Blues the lead before Premier League champions Manchester City came back to win the match 3-2 at Villa Park.
Torres received a lot of criticism for his poor performances last season, but the Italian manager is happy with the striker.
"He was good," Di Matteo said.
"He scored a goal but he also worked very hard for the team, ran a lot and looked good.
"He moved a lot, was in good positions, played with the other team members as well so it was a good performance."
Torres finished Euro 2012 as the Golden Boot winner earlier this summer.