Maldini says Ronaldinho can fill the void left by new Real Madrid signing Kaka, but needs to "take more responsibility".
"Ronaldinho could become a leader, but it's up to him. He has to take more responsibility," Maldini said.
"I don't believe Pato will leave. The hope is that we will be able to see him at Milan for many years to come. He has yet to fully understand his talent. He is only 19."