He told arsenal.com: "It would be massive [to beat United]. We are feeling really confident at the moment and we're in good form in the league, so why not go there and win?
"They have had a bit of a rough start but they have overcome that now I think. They've had a few good results in the league and will be getting their confidence back up, but we are really confident ourselves. Our away record has been really good so hopefully we can continue building on that.
"We have struggled [at Old Trafford] over the last few seasons, so hopefully now that we feel a lot more confident this will be the time when we do manage to do it."
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