By James Cormack Football has never truly been blessed with a litany of elite-level left-backs at any one given time. Full-backs were regarded as undesirable for so long, although a few slick Brazilians helped shift public opinion. The position, both on the right and left, has evolved drastically in modern times to the point where youngsters are actually modelling their games on some of the role’s revolutionaries. Genuine playmakers have started to blossom from right-back and head-down runners continue to thrive down the left. The functions each perform for control-oriented managers can be imm…