The 25-year-old is of the opinion that the veteran midfielder is a crucial component in the Catalans' tactical set-up, and believes he is as decisive as the Argentine ace
The two sides go head to head on Sunday and the Spain international believes that the his team would do well not to divert all of their attention to the Argentine attacker.
"Messi is the one who makes the difference. But we must not forget about Xavi. He is the one who makes the side play up to his level, he is up there with Messi," he was quoted as saying by Marca.
"Messi is the best player in history. He does it all - with his right foot, with his left foot, he takes free-kicks, he's a good header of the ball."
Benat is also of the opinion that his team can cause an upset on Sunday night if they have luck and put in extra effort.
"Mission impossible? Well I recall the same thing being said about Real Madrid. People took it for granted that we were going to lose, and yet we played our game, worked very hard and challenged them without fear.
"In the end, of course, you do need a little bit of luck, and we were that little bit luckier in front of goal, and they were not.
"I think we can do some harm, and we'll certainly try to. We'll just have to make the very best of the few chances we'll get. Barcelona know that we have held our own against them in the past."