Reflecting on his side's display, Ferguson admitted that he had "expected a better performance".
"There is always an expectation that we should do better. We expected a better performance. After the goal we had no time to get back in it. After that the game was start-stop," he told BBC Sport.
"It was difficult for players coming in. Chelsea had everything to play for. [Some of our players] haven't played for quite a while. That being said, we should be doing better."
Next up for the champions is a home clash against Swansea City.