The Brazil international fullback said: "I haven't had any problems adapting at Chelsea. The coach trains us like at Barca, giving priority to ball work.
"What surprised me was the structure of the club. At Barcelona, I trained at the Nou Camp stadium, I did not have a specific place for preparation. Here, we have a centre of training with everything that we need. Weights room, recovery room, everything. The club has a very good structure."
Asked if he will finish his career in Brazil, Belletti also told Globoesporte.com: "I have a contract for three years with Chelsea and when that ends I will be 34 years old.
"I don't want to predict anything. We'll just have to wait and see."