Ferguson was just pleased with another win and another clean sheet, which edges United even closer to a 20th title.
"Yeah, it is a good position but you know the way we approach it is to win our next game," he told MUTV. "That is the best way to do it, carry on doing that.
"I think it was more about determination and concentration at the back, in particular.
"We defended that part very, very well. It was a scrappy game at times and the pitch was lively. It is a tight ground and it was an ideal situation for a shock. Fortunately, we didn't get that.
"One goal is never enough, as you know. It only takes a second to lose a goal.
"I thought we played much better in the second half, I must say.
"We created some good chances but obviously Ryan's goal with 11 or 12 minutes to go killed the game."