Patrice Evra admits his delight at an excellent first half display against Sunderland was tempered by United's inability to run up a decisive scoreline.
The Reds went into the interval just a solitary goal ahead, while the woodwork and Black Cats goalkeeper Craig Gordon were given a thorough workout, and it took a second strike from Dimitar Berbatov after the break to seal the points.
"I think we did a great job in the first half hour," Evra told MUTV. "We pressed the ball very well and there was some nice play. We scored the early goal - I think that's always the target. We need to score the early goal to kill the game early, because after that they can have no confidence and can cause you no trouble.
"The football was great, but it was a dangerous game. At half-time everyone kept saying we needed to keep focus, because when you play like this and don't score, sometimes you can concede silly goals. But we defended well again but I was a bit disappointed to come back into the dressing room at half-time just one-nil up. But in the end we did our job very well."
United's victory was secured by another pair of goals from top scorer Berbatov, and Evra revealed the Bulgarian's double came despite some wayward finishing in the build-up to the Boxing Day encounter.
"I'm very happy with Dimitar," grinned the Frenchman. "We argued a little bit in training because he was missing the goals - I kept moaning at him when he missed - and he said: 'Don't worry, I'll score in the game.' And he showed me that and scored two goals!"