"It's good to end this way, it couldn't have gone any better," he told Sky Italia after victory over Atalanta.
"The future? I don't know. If something is going to happen, it will be after this match. We will see, I don't know yet.
"I have won everything in Italy. When I arrived here many criticised me, saying I was a fantastic player, but I couldn't score goals.
"Now I have won the Capocannoniere title and proved myself. I could not have done any better than this. I have won five Scudetti, the Super Cup, I'm missing the Coppa Italia, but that's OK.
"I don't know what else I can still do in Italy, other than keep going a build a collection."