For some teams the role of the full-back is to be more influential in the attacking half of the pitch, and for the more successful teams this has certainly been the case.

It's not just with the ball players must make good decisions, it's also when teams are out of possession defending an attack.

Defensive full-backs tend to remain 'attached' to their nearest centre back in order to prevent opponents' chances on the counterattack.

The role of an overlapping full-back is to provide the team with width operating in the outside lanes of the pitch and will often overlap the players inside them to either create space or be a viable forward passing option.

The inverted full-back differs to that of the overlapping full-back in that they occupy half spaces on the inside lanes as opposed to playing on the outside lanes.

The auxiliary full-back is one who plays to the side of a back three. Most teams that play with auxiliary full-backs normally deploy just one in addition to two traditional centre backs.

Azpilicueta has been deployed as a wing-back, full-back, and auxiliary full-back on both the left and right hand side of defence giving his team tactical flexibility.

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