Manchester United need new defenders, especially after their start to the new season.
Of course, that statement isn't helped by the Red Devils' convincing 3-0 win over Newcastle United last Sunday—in which the defence was rarely troubled—but the fact remains United could do with strengthening across their back-line.
In central defence, Rio Ferdinand is struggling to keep up with the pace in the Premier League, while Jonny Evans is too inconsistent to be a regular starter for the team, and even Nemanja Vidic is currently having difficulties following his return from injury.
While at left-back, Patrice Evra, Newcastle game aside, has continued his poor form, and on the other wing, Rafael has long been the only available right-back with Phil Jones and Chris Smalling racking up an ever-increasing injury history list.
That has led United to concede more shots and more goals than any of their title rivals and has been the reason for most of their poor results this campaign.
So in the upcoming January transfer window, it's clear Manchester United could do with bolstering their defence.
With that in mind, here are some world-class defenders—or those with world-class potential—which the Old Trafford outfit should realistically target.