To say Manchester United have had a European nightmare this season would be an understatement.
Eliminated from the Champions League in the group stages and subsequently knocked out of the Europa League in the Round of 16—all less than a year after an appearance in the Champions League Final.
While Premier League glory remains a very real possibility, it is difficult to hide from the disappointment of Europe. It was always destined to be a rebuilding year, having lost so many veterans and replacing them with such promising youth.
Now that those young players have faced the harsh reality of European competition, they will come back with the experience necessary to mount a better challenge for the Champions League, but the squad could still benefit from a few key signings.
Each of these five players addresses a key issue or concern in the current squad and would almost undoubtedly improve upon the talented squad Sir Alex already has at his disposal.
It is highly unlikely, if not impossible, that United will sign all five of these players. The financial outlay required would be enormous and unrealistic. At the other end of the spectrum, it is also entirely possible that none of these five will arrive at Old Trafford in the summer.
Regardless of who actually arrives, any combination of these five players would go a long way in preparing United for a run at European glory in the 2012-13 season.