Benitez believes that if Ashley wants to watch the squad being put through their paces or turn up on matchday, he does not need his permission.
“The owner is the owner and he is always welcome here," he said.
“If he wants to come, it is not a problem. We are a professional club and we are open to anyone. And as the owner, he can come whenever he wants."
Benitez added: “This year will be more difficult, because Wolves and Fulham have spent a lot of money, not just this year but also in the past. You look at Cardiff and Huddersfield. We are around that league."