Didier Drogba finally ending Stoke's resistance with his 100th Barclays Premier League goal.
Di Matteo said: "You can discuss what you want about the past. I'm focused on going forward and getting the team in the right frame of mind to be able to win the next game."
He added: "Sometimes during the season, we have to win like this to get the three points.
"It's not always going to be easy and pretty."