The Portugal International has fought for consistency under recently appointed coach Sergio Concukicao. But Ronaldinho remains a fan of the player.
“There are great players in Milan and it's a good team, so I think they can do great things next season,” De Brazilian told Sky Sport Italia.
He added: “Leao does not need my advice, he is a great player. He is one of the players I like best to watch.”
Leao has 10 goals this season and nine assists for the Rossonero.