"He never blamed Wenger for not improving enough but it is sometimes about changing the environment.
"Being in a different place can make things better.
"He was ready to work hard and there is a different style of football. That obviously helped him.
"He still has a lot of things to improve but he is an outstanding talent."
Speaking in midweek, the Liverpool star vowed his City masterclass would be the first of many.
Liverpool FC's Oxlade-Chamberlain has a media day
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“The manager has been pushing me all season and shouting at me for not taking the game by the scruff of the neck at times and providing those kinds of moments, being the one shooting and making the difference,” he said.
“Slowly it is starting to pay off and it helps me to create moments like that and that is what I have wanted to do from midfield.
“It definitely shows why I wanted to come here. But I wasn’t too happy [with my performance]. I could have been better on the ball so I was a bit disappointed with that. The goal – I need to produce more moments like that.
“There were a few runs I did in the first half where I broke the line and it was just the last man I didn’t manage to get past or didn’t get the shot off again. There is room to improve.”