Steven Fletcher's fifth goal for his new club clinched a 1-0 victory over Wigan - the Black Cats' first in the league since they beat QPR 3-1 at the Stadium of Light on March 24, 12 games ago.
"We are still growing and everyone is getting fitter and we will see where it takes us in a few weeks.
"Wigan was a must-win, especially when we have drawn the first four games of the season.
"No disrespect to Wigan, but it was a game we all thought we could win. We needed some points going to City next week because that's going to be a very hard game."