Carra admits it's difficult defending against the Uruguayan.
"I've never seen anyone nutmeg people so often," he told liverpoolfc.com.
"Honestly, I've never seen anything like it. He must do it three or four times in each training session and it's the same in a game.
"The amount of times I have seen him on the by-line, putting the ball between someone's legs, or stood on the line, pulling the ball back.