Tonight's game at Old Trafford takes on a psychological importance. The Premier League won't be won tonight, but the game could have a significant impact on the players' state of mind and self-confidence.

United seem to be playing better and better; they are improving their performance game after game.

The strength of the team is emerging, and it is coinciding with Wayne Rooney's return to his best level.

United will be a serious rival for us in the Champions League and the Premier League, and I think they will be really hard to play against in the second half of the season.

They seem to have rediscovered their defensive stability, and if they can merge it with their attacking ability they will be very dangerous.

For us it is one of the biggest matches of the season, so of course our goal is to win. We have demonstrated that we are strong and efficient away from the Emirates Stadium.

We have only lost once away, against Chelsea, and we have a lot of regrets about the game at Stamford Bridge. We shouldn't have lost that match.

We didn't put in a great performance in our last game against Partizan Belgrade, and I think that most of my players had the match against Manchester United in mind.

Maybe we suffered from the 'fear of losing' syndrome, but we did what we had to do to qualify for the next round.

Source: http://uk.eurosport.yahoo.com/football/arsene-wenger/article/1872/