Manchester United striker Robin van Persie feels there's huge room for improvement in the current squad.

As Sir Alex Ferguson noted a few weeks ago, it means United must be doing something right given the criticism heaped on them for what, at times, even their manager admitted has been shambolic defending.

"I do (accept United have not been playing at their best)," said Van Persie.

"But I just come back to the winning part.

"We have been winning. We are first in the league, first in the Champions League.

"Everyone would have signed for that a couple of months ago. Up to now we can accept it. It is good.

"Now we have to improve. If you just take away a couple of the goals we gave away in away games, we would have made life easier for ourselves."