Manchester United did not have the best of transfer markets in the summer.
They missed out on several players including Cesc Fabregas and Leighton Baines - they did, however, manage to secure the signing of Belgium international Marouane Fellaini from Everton for a fee of £27.5 million.
And despite the arrival of the powerful midfielder, the transfer market did not work out the way the club wanted it to. Here, GMS Academy member Chris Mcmillan takes a look at five potential transfer targets for United, be it in January or next summer.
Manchester United have certainly looked very vulnerable in defence so far this season.
Rio Ferdinand has somewhat showed his age and has been overplayed by manager David Moyes, for a player of his age.
United captain Nemanja Vidic has looked a shadow of the player he was before his long injury lay-offs and is currently being linked with the likes of Serie A champions Juventus and Italian giants AC Milan.
Subotic has also been linked with United as one of their top transfer targets and he certainly fits the bill. Rumours are also circulating that the Serbian defender could be used as bait in a bid for Borussia Dortmund to re-sign Japanese attacking midfielder Shinji Kagawa in a swap deal.
The United defence does currently look like an area which the club does need to strengthen and this transfer could possibly benefit both parties. This transfer however, does not necessarily mean other defenders such as Chris Smalling, Johnny Evans and Phil Jones will be forgotten.
Leighton Baines was a transfer target for United throughout all the summer transfer window, but they failed in their bids to sign the England international due to failing to match Everton's estimations for the player.
Baines has been in superb form for Everton for such a long time. Last season the left-back managed to score five goals and create 116 chances in the Premier League in 38 appearances for Everton, as reported by Squawka.
And this year the left-back has scored two goals and made 11 chances. Impressive stats, I'm sure you'll agree.
The need to sign a left-back at United is quite evident; Alexander Buttner does not really fit the bill while Patrice Evra has dipped in form.
Going forward, Evra is great. Last season he enjoyed one of his best seasons in England but still he has grown defensively lazy, so to speak.
Clubs have been exploiting the left-hand side of United most of the season, none more so than against Manchester City.
If United were planning on signing a new left-back, which they probably should, Baines ticks all the boxes and Moyes should do all he can to tempt his former club into parting with one of their most prized assets.
This is a player that Manchester United were supposedly close to signing in the summer.
Herrera has been likened to players such as Cesc Fabregas and if that is anything to go by, then surely he would be a perfect player for United?
The club needs a player who can sit in central midfield and create chances, something which United currently lack.
The whole saga surrounding the player's protracted move was shocking, with reports that three 'fake' lawyers turned up trying to secure the player's services.
If United were to go back in for the player, then they would have to part with around £30 million to secure the player.
This would certainly mean United would have to offload players such as Anderson to make way for Herrera.
Ross Barkley is a certainly a player with a bright future ahead of him.
His name is on everyone's lips at the moment after a fantastic start to the season and he has already gained an international cap for England at the age of just 19.
The Liverpudlian is a player with huge amounts of energy, with the ability to score goals and make goals too. Barkley is already a player to watch.
He is attracting a lot of interest at the moment, with clubs such as Manchester City reportedly interested in the teenager. He could potentially be United's long-term replacement for Paul Scholes and would for sure be a long-term investment.
If United wanted to sign Barkley, they would have to part with at least £20 million.
Juan Mata/Kevin de Bruyne
Both players would be perfect for Manchester United. At the start of the season, Mata appeared to be out of favour with new Chelsea manager Jose Mourinho but has since managed to regain his place in the team.
The only problem with United trying to sign the Spanish international is whether Mourinho would sell to a club rival. The answer is probably no - why would Mourinho want to hinder his team and benefit a rival?
Perhaps looking at signing De Bruyne would be a better idea. Rumours are escalating that De Bruyne has fallen even further down the pecking order at Chelsea, with many German clubs on the lookout for the player.
It is not a silly idea for United to try and sign him - the wing is definitely a problem position for United at the moment with so many under-performing stars.
De Bruyne is a player that can play either wing or behind the striker and he would certainly fit the bill.
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