The Scouser told liverpoolfc.tv: "He's definitely one of the best players in the world. You look at Kaka and Messi, but they probably play further forward.
Carra insists he and his teammates won't fear anyone when the Champions League knockout draw is made on December 21.
"We'll be a big game for anyone as well, don't forget. When you're in the Champions League you play the best teams in Europe.
"It's good players and the top teams in the best stadiums, but if you want to progress you've got to beat the best."