Wilshere started on the bench against Napoli as the Gunners recorded a 2-0 Champ[ions League victory.
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."
Wilshere continued: "When I (first) broke into the team, it was similar - there was (Cesc) Fabregas, (Abou) Diaby, (Alex) Song, players like that.
"It brings the best out of me and it will bring the best out of the other players as well.
"If we can keep everyone fit, we are going to be real contenders in all four competitions.
"We have not really had this over the last few years, all of this competition for places.
"We are all excited and we just have to keep it up now."
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