Libero The position of the libero appeared in volleyball in the concept of the last century. The playing field can replace any player on the back lines. Although this is a difficult ball. The Libero cannot be selfish.
Because not all tall players have the necessary coordination. Therefore, all coaches (yes, not all, absolutely everything and everyone) issue liberos instead of central blocks. These were just those guys, like tanks during the First World War. In principle, there is no binder, diagonal or player. By the way, libero can always be easily determined on the site. The color of his playing uniform is different from what his partners use.