The Brazilian netted his 100th and 101st goals for Milan in their 3-0 win over Atalanta.
“I don’t know how to explain it,” he told the gathering media. “I’m glad to be a part of the history of this club.
“Each goal I score is exciting. Every time I hear the fans it’s exciting – it gives me a great feeling because I know it comes from their heart.
“This was the best way to start 2014.”