"We're into the run-in now. After New Year the games start to drop off very quickly and before you know it you're down to the last few. We're trying to stay focused and not get carried away," the boss told MUTV.
"The players know they're going to have to work hard to win this title. But we've got a good squad and I think we're improving in certain aspects of our play."
Sir Alex was particularly pleased with United's defensive display as a unit at the Madejski Stadium.
"We had to work really hard and defend as a group," he observed. "There's a good understanding of the importance of the defensive part of our game and we're better than we were last season in that sense."