The boss was delighted to hand Juan Mata his debut against Ole Gunnar Solskjaer's Bluebirds while Robin van Persie and substitute Wayne Rooney returned from injury. However, he issued a warning that there is still plenty of work to be done at Old Trafford.
"My mood has improved as I know I've got some really good players coming back," he replied, when asked at the post-match press conference if he was feeling more cheerful.
"I still want us to be more convincing. I want to win better and play much better. Don't think, because we've won, I've got a smile on my face and am happy. I'm happy for the points but, for where we want to go and the vision of how I want the team to play, I still think there is a long way to go."