The England striker admits that the Gunners are playing "brilliantly" at present but is confident that his side can draw on their past triumphs to bridge the gap at the top
The Red Devils are eight points behind the Gunners after dropping points earlier in the campaign but are now unbeaten in eight matches in all competitions and the England international is confident that his side can go some way to bridging the gap at Old Trafford.
"We're obviously capable of beating Arsenal - we've done it many times in the past," Rooney told reporters.
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Although Arsene Wenger's side have been in impressive form, having not lost in the league since the opening day, Rooney is hesitant to mark them down as title favourites.
"We'll have to wait and see where they are in March," he remarked. "We've seen before that they've been in the top two until February and March and then they've faded off, so it's down to them to try to stay there.
"They're doing brilliantly at the minute and they're in a great position so it's up to us to catch them.
"We know we're capable of playing better and we're starting to do that; we need to start picking points up and see where we are come Christmas.
"We're nine or 10 games in so there's no big worry at the minute. We're starting to do well so, if we can get the victory on Sunday, I think we'll be in a great position."
The Red Devils have already drawn at home to Chelsea and Southampton and lost to Liverpool, Manchester City and West Brom so far this season but a win on Sunday would put them within five points of the top of the table.