The Dane is on-loan at Juve from the Gunners.
"You feel it's maybe even a bigger step than Arsenal. 'I thought it would be good for me to come here to a big club with big expectations, sort of how it was at Arsenal when I first went there. With all the tradition, if you can make it here and score goals then you can make it anywhere.
"From what I'm hearing, some of the players left because they didn't feel Arsenal still had the same ambitions as they did.
"I can't blame people for wanting to go to United or Barcelona. Robin has been brilliant since he's been at United. He was the main man as soon as Cesc left. He became captain and took the responsibility. Everybody could see he had that ability at Arsenal and now he's improved because he probably thought he could get better at United.
"I feel that if I was still there I would be able to compete for a place. Despite what happened to me it's still a great club and I still feel for some people there. I wouldn't say that I can never ever go back but at the moment it's not on my mind."