that'll be why left-backs and right-backs are still called "full backs", while central defenders are "centre-halves" it's funny that the centre-half is now often deeper than the full-backs wasn't that formation a bit attack-heavy? seems to me that there'd be plenty of space behind the centre-half? or would the full-backs move inside to pick up the centre-forward, leaving the left-half and righ-thalf to mark the wingers?