Pato has thrived under the guidance of Leonardo this season and feels he can reach his potential working for his fellow Brazilian.
"Leonardo is a person of very clear mind. The first time I met him I was at the airport, I was 16 and was about to embark for Japan with the Under 17 team," said Pato.
"He came over and asked me how I was and gave me advice I still remember: do not leave your club, wait, it is too soon to make the big jump.
"Two years later he introduced me to Milan when he was a manager. I wonder if even back then he intended to sign me."
Pato added: "I always felt at home at Milan. Really. When I first decided to join, I received phone calls from Emerson and Serginho, they said: 'Welcome to your new family'."