Antonio Valencia(01 of10)
Open Image ModalValencia returned so encouragingly from a six-month layoff in 2010-11, yet has regressed over the last three seasons, and has only played well over a four-month period between December and April during the 2011-12 campaign.Too muscle-bound, he is not as zippy as he was in his first term at Old Trafford, his crossing is diabolical for a winger and he does not score enough goals.Contract expires: 2015 (credit:PA)
Anderson(02 of10)
Open Image ModalOverweight and overlooked by David Moyes, it is difficult to think of a player who has contributed less to four United title wins. After an auspicious debut campaign in 2007-08, Anderson seems to have gotten worse.Recklessly rewarded with a new contract after a spate of encouraging displays in December 2010, he is rarely listed in Moyes's matchday squads and should have been sold in the summer.Contract expires: 2015 (credit:PA)
Tom Cleverley(03 of10)
Open Image ModalCleverley turns 25 this year, and he has not reached the level he showed at the start of the 2011-12 season, when United became briefly dependent on him in central midfield.Disliked by a large portion of United's supporters, his decision to launch a website and brand after seven first-team games for the Reds was an early warning sign. Cleverley's presence in Moyes's line-ups highlights United's midfield malaise.Contract expires: 2015 (credit:PA)
Alexander Büttner(04 of10)
Open Image ModalA competition winner of a full-back, it is enough of an insult to Fábio da Silva that the off-form Patrice Evra has kept his place in the first XI, let alone the presence of Büttner as back-up. What was Fergie thinking?Contract expires: 2017 (credit:Getty Images)
Bébé(05 of10)
Open Image ModalSir Alex Ferguson's worst ever signing and perhaps the worst ever 'footballer' to have worn the red shirt. No need to add any more.Contract expires: 2015 (credit:PA)
Ashley Young(06 of10)
Open Image ModalHe has improved recently but Young has not been good enough over the course of two-and-a-half-years with United and is fortunate United's options on the wing are nearly as insufficient as they are in midfield.Contract expires: 2016 (credit:PA)
Shinji Kagawa(07 of10)
Open Image ModalInitially, and unfairly, ignored by Moyes, Kagawa has simply not played well this season and it seems like it just won't happen for him in England.Could be a handy makeweight in any possible deals for Borussia Dortmund's İlkay Gündoğan or Marco Reus.Contract expires: 2016 (credit:Getty Images)
Javier Hernández(08 of10)
Open Image ModalSince he endorsed speculation surrounding his future at United, Hernández has struggled in the side. He continues to be a liability on the ball outside of the box and is now very much the club's fourth-choice striker, thanks to Danny Welbeck's good form.Tottenham had a bid rejected in the summer and he could command more than double the £6m United paid for him in 2010.Contract expires: 2016 (credit:Getty Images)
Darren Fletcher(09 of10)
Open Image ModalPopular, tough and committed, while it seems callous to suggest Fletcher - and much depends on how he performs in the second half of this season - he has played 24 times in the last two-and-a-half seasons, turns 30 next month and was viewed as a stop-gap during his excellent form between 2008-10. United will also, you sense, finally bring in some good midfielders this year.The main thing is he is healthy again and can continue his career, only it could be away from Old Trafford.Contract expires: 2015 (credit:Getty Images)
Ben Amos(10 of10)
Open Image ModalTwenty-four this year, the goalkeeper needs to move on permanently and play regular football.Contract expires: 2015 (credit:Getty Images)