Vidic believes they are a team with 'few alternatives'.
He said: "When they play against teams who drop deep, they can have a bit of trouble because Real aren't a team that crosses the ball a lot.
"If you get players behind the ball, it is difficult for them to get through and they have to shoot from distance because they don't have many crosses.
"They don't have many alternatives. They have Ronaldo, who can jump when he is in the box but he's the only one. I don't think the other players are good in the air."