Do they risk neglecting their football duties?

One of the most intriguing transformations in football has been the evolution of the modern full-back. Nowadays, they are ever present in the final third of the pitch, surging forward into the penalty area and increasingly ending up on the scoresheet. However, as more and more young starlets flock forward in search of the headlines, do they risk neglecting their essential defensive duties?
In the not too distant past I can recall full-backs essentially playing arm in arm with their centre-back brethren, moving up and down the pitch as one cohesive unit. Over the years however, an increasing n...