Monk/Simba - Taking the ball from the back four is not the issue, running up to the back four while they are effectively on the edge of the 18yrd box is. Receiving the ball from the back four is equally not a problem, taking it from the toes of the back four is. By coming that far back it is opening up the midfield hugely and cramping the back four.

Trust me when i say it is not something that is regarded as "good football" to do so.