Despite considering himself among the best in the world, he left the Barclays Premier League with his reputation in tatters and a return of just 16 goals.
"Of course, I didn't do my best (at City)," he said. "It doesn't only depend on me, but on the whole group.
"I had no problem with (manager Roberto) Mancini. I always had a good relationship with him, but the problem is that English football is not so good for Brazilians, it's not my style.
"I wish success to Mancini, but life goes on. I want to make my name here.
"I am confident of succeeding with Milan because they have very good Brazilians. It's a club that always wants to play, has welcomed us very well and where many have made history. I hope the same happens to me."