Benitez felt Dowd got the decision wrong and that Attwell, 26, is too young to officiate top-level matches.
"Everybody could see there was a penalty," Benitez said afterwards. "It was so clear, it is unbelievable. With this referee, I knew this (a second penalty) was impossible."
When asked by Sky Sports what he thought of the referee, actions spoke louder than words as Benitez pulled out his spectacles before commenting: "We had a meeting the other day, and they said we cannot talk about the referee as a person or the decisions, but I think everybody today could see the situation.
"The fourth official is a young referee, and maybe he needs to calm down a bit. I do not know how old he is, but the fourth official is too young."
