3-2-1 Defense movements

 

	The opponents LW has the ball R1 covers the attacking LW. R2 is advanced and cover the attacking LB and is ready to help R1 in case of a break-through attempt. R3 has fallen back and covers the area between the advanced R2 and the attacking CB in case of an attack. L3 covers the opponents CR. The opposite L2 and L1 has moved against the center and leaves the attacking RW uncovered, because there is no immediate threat from that side. Only a very long pass from LW to RW makes the threat real.
	The opponents LB has the ball. R1 falls a bit against the center, but still have the primary task to cover the attacking LW. However ready to help R2 in case of a break-through attempt. R2 has advanced and covers the attacking LB. R3 has moved outward against the attacking CB, but is still ready to support R2 in case of a break-through attempt. L3 still covers the opponents CR. The opposite L2 and L1 are still near the center, but are now very much ready to move outward
	The opponents CB has the ball. At this moment the position of the defending players looks like the line-up, which normally is shown when describing a 3-2-1 defense. Both L1 and R1 have moved a bit against the center: Both LB and RB have advanced: L3 has advanced too and R3 still covers the attacking CR