The north London side sealed a 2-1 victory over Louis van Gaal’s men in the FA Cup quarter-finals back in March thanks to goals from Nacho Monreal and Danny Welbeck.
Arsenal suffered a blow to their hopes of finishing in second place in the Premier League this season after slumping to a surprise 1-0 loss to Swansea City at Emirates Stadium on Monday night.
However, midfielder Oxlade-Chamberlain believes that Arsenal’s positive result against the Red Devils earlier this season should be a source of confidence for the north London side.
Oxlade-Chamberlain told Arsenal Player: “You can definitely take confidence from any win at Old Trafford. It’s a hard place to go and win, especially against a good Manchester United side.
“It will be a tough game but we can take positives from our last trip there in the FA Cup and the win that we managed to come away with.
“That was in a high-pressured environment, as we had to win that to get through to the next round of the cup. To do it at Old Trafford is a big achievement.
“We go into every game trying to win and it hadn’t gone that way for us [in the past], but in the two Manchester fixtures this season we’ve done well and come away with two wins.
“It’s other people that will analyse it and say that we’ve stepped over a [psychological] hurdle. We just go into it and focus, as we do with every game, on coming away with the win.”
The England midfielder is currently sidelined with a groin injury and is not expected to be fit for Sunday’s clash with the Red Devils.
Oxlade-Chamberlain has scored two goals and made two assists in seven Premier League games so far this season.
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