The Brazilian moved to Milan from Manchester City in the final days of the summer market.
“I must admit I didn’t expect to have such a positive start straight away,” he told the Corriere dello Sport.
“If it went this well, it is because I worked in the right way. There was no particular secret other than hard work and belief in my own abilities. Adding in the belief of the Coach and my teammates, then obviously things were set to go well.
“At Milan everyone appreciates Brazilians and my family felt that too. I am so happy with the way I was welcomed to the club. As for the Italians, Rino Gattuso taught me what it means to play in a side like Milan. He never pulls out of the tackle, not even in training.
“I feel happy here. I want to stay at Milan for 10 years, then at the age of 36 I can hang up my boots.”