The former Red Devils doing the best away from Old Trafford.
Manchester United may seem to be steadying themselves after a difficult spell under David Moyes, but there are still a number of current players who they probably wish they still had on the books.
January Transfer Done Deals 2015: All Completed Transfers This Window, Including Liverpool, Chelsea, Arsenal & Man United.
Manchester United Boss Louis Van Gaal Ready to Drop Wayne Rooney.
Manchester United transfer news.
Here are the five best stars who used to ply their trade at Old Trafford.
5. Gerard Pique, FC Barcelona
Was actually a Champions League winner with United after lifting the trophy in his final year of four during the 2007/08 season, but since heading back to Catalonia the centre-back has greatly improved.
Things may not be as good for Pique currently as they were when he was winning the World Cup back in 2010, but the 27-year-old is still regarded among the best in the game.