The England midfielder sees competition for places at the Emirates as a positive thing.
Wilshere said: "It was just a formation thing. I am feeling fine, (Tomas) Rosicky is coming back from injury and needed a game.
"I have played a lot of games recently, so I was just happy to get on and help at the end.
"We still have Santi Cazorla to come back, so we are going to have a great squad."
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