AC Milan vice-president Adriano Galliani is delighted with the impact of summer signing Zlatan Ibrahimovic.
Ibrahimovic said this week that he would like to stay with the Rossoneri for a long time.
"Ibra strongly wanted Milan. I think we will almost certainly be his last club and hope to keep him playing past the age of 33," said Galliani.
"When we signed him, I realised why he has won so much. He is a warrior, strong with his head and his body. Seeing him on the field gives the others confidence.
"Ibra is absolutely crucial for us and a striker we haven't had for the last 25 years. The moment he signed the contract, I said we'd win the derby 1-0 with his goal under the Curva Nord, just like Ronaldo."