There will be very few United fans out there right now who accept that the current crop of players are all the best in the league in regards to the position they play.
Certainly, that's not true of all Man United players this year. For example there will be very few who argue that Robin van Persie is not the best out and out striker in the entire division, and players like Antonio Valencia and Shinji Kagawa also stake a claim to be the best at what they do.
However, there are areas—with defensive positions particularly in mind—where other teams hold the edge over Sir Alex's men.
This is not a list of realistic "transfer targets." Rather, it is an analysis of where other teams are particularly strong and, as such, a look into the type of player that United should be looking in to challenge that particular individual.
Unsurprisingly, as I previously alluded to, the majority of players on this list will ply their trades in defensive positions as opposed to offensive ones.
The United attack is stronger now than it has been since the departure of Cristiano Ronaldo to Real Madrid. In fact, one could easily argue that the Red Devils currently boast the most lethal front line in the Premier League altogether.
If they could bring players—or train up youth products—of the quality of some of the men listed here, the sky really would be the limit for Fergie and his boys.