"We're concerned that we are making so many chances and not taking them," he United boss told MUTV.
"In the first half, I don't know how many we had.
"I hope we don't live to suffer because of it. If there's one part of the game that's giving us any concern, it's the finishing.
"Their performance level is very good, and the concentration and energy of the team are very good as well, so we've got to hope we can start scoring regularly."
"We are very good defensively. Jonny Evans has come in for Rio Ferdinand, and he's done fantastic. The boy's an absolute gem of a player. We're so lucky to have him. He's only 20, but he reads the game so well."