Old Trafford has seen the development and emergence of many true superstars over the years.
In the Premier League era, many youngsters have reached their true potential at Manchester United, while more experienced players have come in and changed the team dynamic for the better.
Yet no club can be perfect. There will always be the odd signing or youth team graduate who infuriates the fans as much he thrills them.
These footballers had talent, but struggled to reach a consistent peak during their careers.
Here is a starting XI of the Red Devils' most frustrating players in the Premier League era.
As always, this list is intended to spark debate rather than end it.