Wilshere started on the bench against Napoli on Tuesday night when Germany international Ozil scored his first Arsenal goal with a sublime side-foot finish and then set up Olivier Giroud to make it 2-0 inside 15 minutes and effectively kill off the tie as the visitors never looked like mounting a recovery.
"It was just a formation thing," he said of his place on the bench. "I am feeling fine, [Tomas] Rosicky is coming back from injury and needed a game.
"[The competition] brings the best out of me and it will bring the best out of the others as well. I have played a lot of games recently, so I was just happy to get on and help. "