Manchester City sold the former Inter striker yesterday.
"I have to be honest, I'm a massive Inter fan, but I have no regrets," said Moratti.
"He's a Milan gamble, a good signing that we couldn't and didn't need to make because he's already played for us.
"It could be a good move for them. I see it as a useful operation for Milan President Silvio Berlusconi for a thousand reasons. We'll see how it ends."