The FA have warned they may look into the comments.
Benitez said: "I do not have to justify anything. I was looking for some facts that everyone knows but no-one wants to say.
"I have a lot of respect for him because he is a great manager but he was talking too much about Liverpool so he has to stop.
"He started talking a long time ago. It won't have the same effect on me because if he talks too much and too quickly then I won't understand so I will be happy."