Arsenal
The Bank of England club might have to swallow their indifference to the January window, with the re-build to end all re-builds looming on the horizon. Petr Cech needs a long-term replacement, Per Mertseacker is retiring, Nacho Monreal the wrong side of 30, Laurent Koscielny's Achilles has reduced him to a mere mortal, Hector Bellerin needs back-up, central midfield needs reimagining, Mesut Ozil might need replacing, Alexis Sanchez definitely will and there are no wingers. Oh, and they have to manage the transition away from the most successful manager in the club's history (eventually).
You're not going to get all that done in four weeks, so the emphasis needs to be on short-term impact. Arsene Wenger expresses a preference for a back four, and if Arsenal are to make this work they need better options on the flanks. Theo Walcott looks set to follow Alex-Oxlade Chamberlain out of the door, and there is a lack of devastating pace and willingness to make off-the-ball runs across Arsenal's attack.
Sanchez operates more like a second striker cutting in from the left, while Alex Iwobi is really No.10/No.8 - adept at stitching play together but offering little threat at the sharp end. Danny Welbeck is a good defensive option in big games, but lacks the trickery and guile required against deep-lying defences. Alexandre Lacazette is a fine addition, but needs more support to move defences around and isn't quite as fast as people think over more than 10 yards. Walcott had his detractors, but was a reliable source of goals and assists in Arsenal's old 4-2-3-1 and they need to be replaced. In truth, Arsenal probably need two high-class wide-forwards for when Sanchez departs.
Potential targets: Nabil Fekir, Julian Draxler, Wilfried Zaha, Thomas Lemar, Riyad Mahrez, Lorenzo Insigne.
Bournemouth
Not much has changed at Bournemouth despite a downturn in fortunes. They still concede plenty of goals, but that's a consequence of their ambitious style of play and unlikely to be solved by purchasing a new defender as a sticking plaster. Asmir Begovic looked an astute piece of business last summer, ushering out the error-prone Artur Boruc, but Begovic has not been immune from the odd howler. Despite Jermain Defoe's ankle injury, Eddie Howe has ruled out a move for a striker in January. The full-back positions could do with some freshening up - Adam Smith and Charlie Daniels have been with Bournemouth throughout their rise up the leagues and will need replacing. Bournemouth have been linked with a move for Chelsea youngster Dujon Sterling, and they have picked up fruit from that particular tree in the past.
Central midfield also looks a little stale, and after they could do with some added technical security and creativity in that area given the style of play Howe wants to execute.
Potential targets: Dujon Sterling, Tom Cairney, Danny Ings.
Brighton
They have already shown their hand with a move for Celtic's Moussa Dembele, and Brighton need pace and guaranteed goals at the top end of the pitch. Elsewhere, they are a settled unit, well organised by Chris Hughton with a centre back pairing of Shane Duffy and Lewis Dunk to rival any team outside of the Big Six. Solly March, Jose Izquierdo and Anthony Knockaert are good options on the flanks, but they desperately need that elusive striker.
There is plenty to like about Brighton, but they risk becoming this season's Middlesbrough: a competitive outfit who avoid any thrashings but ultimately fall short of Premier League quality.
Potential targets: Moussa Dembele, Jarrod Bowen, Ze Luis.
Burnley
Burnley regulars implored Sean Dyche to sign a new centre back following the sale of Michael Keane last summer, but their fears have since been allayed by the form of James Tarkowski. Nevertheless, Burnley lack depth at centre back with Kevin Long their first reserve. Dyche's coaching and style of play often covers for individual deficiencies, but they would not want a lengthy spell with Long and Ben Mee as their only central defenders.
Central midfield has developed significantly since promotion in 2016, with Jack Cork and Steven Defour adding more layers to their play through their range of pass. Johann Berg Gudmundsson has been involved in more league goals than any squad member, but Burnley could use another tricky winger with speed.
The centre forward position has been shared between Sam Vokes, Ashley Barnes and record singing Chris Wood, but Dyche's side would benefit from a more mobile striker to stretch defences and give them more counter-attacking potential. There will be no rush to do business however, and the window could pass with little activity at Turf Moor.
Potential targets: Aaron Lennon, Joe Worrall, Kamil Grosicki, Karl Toko Ekambi.
Chelsea
Antonio Conte was left exasperated by Chelsea's dealings in the summer window, so they have plenty of unfinished business this January. After Alex-Oxlade Chamberlain chose a move to Liverpool, Italian utility man Davide Zappacosta was recruited to provide cover in the wing-back positions. The champions need another wing-back to provide back-up for - or replace - Marcos Alonso and Victor Moses. Juventus left-back Alex Sandro is their Goldilocks signing in this area. Cesar Azpilicueta has been used at right-wing back at times but is far more comfortable on the right of a back three.
Central midfield and defence is well-stocked - unless David Luiz is moved on - so Conte's focus will be at the top end of the pitch. His reluctance to start with Michy Batshuayi during Alvaro Morata's injury lay-off was telling, and Chelsea need a genuine alternative to the Spaniard. Diego Costa has gone, Romelu Lukaku slipped through the net, but buying high-quality squad members is notoriously difficult.
Willian and Pedro are still reliable performers, but there is a feeling Conte could use more goals and assists from the attacking midfield areas to take the pressure of Eden Hazard. They are expected to pursue long-standing target Ross Barkley again.
Potential targets: Alex Sandro, Ross Barkley, Alex Telles, Thomas Lemar, Richmond Boakye, Riyad Mahrez.
Crystal Palace
Roy Hodgson's resurgent Crystal Palace look in a far healthier state than they did a few months ago, but are another team chasing a striker this January. What has happened to Christian Benteke?
At Villa, he had a nice balance to his game: aerially strong and a threat from crosses, but also capable of sprinting behind defences on the break. He seems to have lost all of his mobility - perhaps due to an Achilles rupture - and has been reduced to a static target man. Wilfried Zaha has an eye for a cute, reverse pass around the penalty area, and he would benefit from a more subtle forward who could read him.
Conor Wickham has not make a league appearance this season due to a dreadful knee injury, so the situation is urgent - Palace need quality and quantity. Left-back might be a position Roy Hodgson will look at, Jeffrey Schlupp and Patrick van Aanholt are closer in profile to wing-backs than full-back and Palace might want a more conservative option. Julian Speroni might be a fan's favourite, but after Wayne Hennessey's recent dip in form Palace need a new No.1.
Possible targets:Diego Lopez, Harry Arter, Islam Slimani, Benik Afobe.
Everton
Sam Allardyce has seen a turnaround in Everton's form since arriving and will have identified areas where is team is weak. Clearly, pace and width is an issue and even with Yannick Bolasie returning from injury.
A lack of goals is the main problem and to score them you need a finisher and a creator. Could Theo Walcott be tempted by a move north? Even a loan move might do wonders for his wilting World Cup hopes, and the pace and direct wide play he'd offer supplying crosses for the striker Allardyce will also surely look to sign makes sense.
That striker could well be Christian Benteke but with Roy Hodgson in the middle of a relegation escape, Crystal Palace would be mad to sell the Belgian, no matter how many penalties he misses. Steven Nzonzi is another linked with the club but is less of a priority than Everton's attack, while Ashley Williams' dreadful season could inspire a bid for a reliable centre-back.
Jonny Evans, linked with every club who aren't West Brom, could be an option and who would blame another of Burnley's impressive centre-backs joining Michael Keane and getting the band back together? James Tarkowski would be cheaper and more attainable than many other defensive Premier League stars. Cheaper still might be Lamina Kone at Sunderland, who has already worked with Allardyce.
Potential targets: Lamina Kone, Steven Nzonzi, Christian Benteke, Theo Walcott, Jonny Evans, James Tarkowski and *whisper it* Daniel Sturridge.
Huddersfield
David Wagner's side have proved capable of competing in the Premier League but they will know there is a long way to go just yet, and the squad could yet do with some improving.
Jonas Lossl, the Huddersfield keeper, on loan from Mainz, shows flashes of brilliance but he is too error prone and without any real competition, his position isn't too often challenged.
Potential targets: The most obvious candidate to vie for the goalkeeper spot would be Danny Ward, who played the majority of last season on loan from Liverpool as Huddersfield were promoted to the top flight. He is third-choice at Anfield so why not go back in for him?
Leicester
Whoever Leicester sign (if any) in January, they'll be sure to get things finalised before the deadline having paid the price for a few seconds' delay in the paperwork of Adrien Silva. He'll count as a new signing and with Leicester looking fairly settled for a mid-table finish this season, will surely not feel pressured into making any drastic changes during the window.
It's unclear as to how Claude Puel sees this team developing but a replacement but some talented squad players would certainly help and certainly ones in central defence. A new partner for Harry Maguire? A better right-back?
It depends on the ambition of Leicester's owners and the skill of the scouts - candidates exist but is there any point in leaving a mid-table club to join another (other than the signing-on fee)? Is it worth paying an inflated price in January for someone you don't urgently need but could sort of do with?
Potential targets: Jonny Evans, Lokomotiv Moscow's centre-back Solomon Kvirkvelia, Lamina Kone.
Liverpool
A lot is made of Liverpool's supposed defensive weakness but £75m signing Virgil van Dijk could end up with the same familiar problem of being exposed by players higher up the pitch. Jurgen Klopp could do with an old-school number four, a holding defensive midfielder who can provide protection, better reads the game and can hit a pass or two from deep.
Naby Keita will join the club in the summer and it wouldn't be a surprise if RB Liepzig allowed him to leave sooner. Stranger things have happened.
Potential targets: Julian Weigl from Borussia Dortmund, Ruben Neves from Wolves, Riechedly Bazoer of Wolfsburg.
Manchester City
Despite appearing so far ahead of the chasing pack that it feels like Pep Guardiola's stunning side might end up lapping some other clubs, the race is still on and Man City intend to keep their foot firmly on the accelerator.
Fernandinho has been outstanding this season but when he's not around City don't function in quite the same way and a suitable deputy, or squad rotation member could help. Julian Weigl or someone similarly capable of the deep-lying, short-passing game required would fit the bill.
Guardiola had apparently identified Virgil Van Dijk and Alexis Sanchez as two players he wants to help City win every trophy in the land, but Van Dijk has gone to Liverpool and Sanchez would be really expensive form a player with only six months left on his contract, though injuries to Gabriel Jesus and Kevin De Bruyne may force his hand. Jonny Evans is another heavily linked with a move and would be welcome in a squad slightly weak (in the weakest sense of the word) in depth at centre-back.
Potential targets: Nabil Fekir, Julian Draxler, Wilfried Zaha, Thomas Lemar, Riyad Mahrez, Lorenzo Insigne.
Bournemouth
Not much has changed at Bournemouth despite a downturn in fortunes. They still concede plenty of goals, but that's a consequence of their ambitious style of play and unlikely to be solved by purchasing a new defender as a sticking plaster. Asmir Begovic looked an astute piece of business last summer, ushering out the error-prone Artur Boruc, but Begovic has not been immune from the odd howler. Despite Jermain Defoe's ankle injury, Eddie Howe has ruled out a move for a striker in January. The full-back positions could do with some freshening up - Adam Smith and Charlie Daniels have been with Bournemouth throughout their rise up the leagues and will need replacing. Bournemouth have been linked with a move for Chelsea youngster Dujon Sterling, and they have picked up fruit from that particular tree in the past.
Central midfield also looks a little stale, and after they could do with some added technical security and creativity in that area given the style of play Howe wants to execute.
Potential targets: Dujon Sterling, Tom Cairney, Danny Ings.
Brighton
They have already shown their hand with a move for Celtic's Moussa Dembele, and Brighton need pace and guaranteed goals at the top end of the pitch. Elsewhere, they are a settled unit, well organised by Chris Hughton with a centre back pairing of Shane Duffy and Lewis Dunk to rival any team outside of the Big Six. Solly March, Jose Izquierdo and Anthony Knockaert are good options on the flanks, but they desperately need that elusive striker.
There is plenty to like about Brighton, but they risk becoming this season's Middlesbrough: a competitive outfit who avoid any thrashings but ultimately fall short of Premier League quality.
Potential targets: Moussa Dembele, Jarrod Bowen, Ze Luis.
Burnley
Burnley regulars implored Sean Dyche to sign a new centre back following the sale of Michael Keane last summer, but their fears have since been allayed by the form of James Tarkowski. Nevertheless, Burnley lack depth at centre back with Kevin Long their first reserve. Dyche's coaching and style of play often covers for individual deficiencies, but they would not want a lengthy spell with Long and Ben Mee as their only central defenders.
Central midfield has developed significantly since promotion in 2016, with Jack Cork and Steven Defour adding more layers to their play through their range of pass. Johann Berg Gudmundsson has been involved in more league goals than any squad member, but Burnley could use another tricky winger with speed.
The centre forward position has been shared between Sam Vokes, Ashley Barnes and record singing Chris Wood, but Dyche's side would benefit from a more mobile striker to stretch defences and give them more counter-attacking potential. There will be no rush to do business however, and the window could pass with little activity at Turf Moor.
Potential targets: Aaron Lennon, Joe Worrall, Kamil Grosicki, Karl Toko Ekambi.
Chelsea
Antonio Conte was left exasperated by Chelsea's dealings in the summer window, so they have plenty of unfinished business this January. After Alex-Oxlade Chamberlain chose a move to Liverpool, Italian utility man Davide Zappacosta was recruited to provide cover in the wing-back positions. The champions need another wing-back to provide back-up for - or replace - Marcos Alonso and Victor Moses. Juventus left-back Alex Sandro is their Goldilocks signing in this area. Cesar Azpilicueta has been used at right-wing back at times but is far more comfortable on the right of a back three.
Central midfield and defence is well-stocked - unless David Luiz is moved on - so Conte's focus will be at the top end of the pitch. His reluctance to start with Michy Batshuayi during Alvaro Morata's injury lay-off was telling, and Chelsea need a genuine alternative to the Spaniard. Diego Costa has gone, Romelu Lukaku slipped through the net, but buying high-quality squad members is notoriously difficult.
Willian and Pedro are still reliable performers, but there is a feeling Conte could use more goals and assists from the attacking midfield areas to take the pressure of Eden Hazard. They are expected to pursue long-standing target Ross Barkley again.
Potential targets: Alex Sandro, Ross Barkley, Alex Telles, Thomas Lemar, Richmond Boakye, Riyad Mahrez.
Crystal Palace
Roy Hodgson's resurgent Crystal Palace look in a far healthier state than they did a few months ago, but are another team chasing a striker this January. What has happened to Christian Benteke?
At Villa, he had a nice balance to his game: aerially strong and a threat from crosses, but also capable of sprinting behind defences on the break. He seems to have lost all of his mobility - perhaps due to an Achilles rupture - and has been reduced to a static target man. Wilfried Zaha has an eye for a cute, reverse pass around the penalty area, and he would benefit from a more subtle forward who could read him.
Conor Wickham has not make a league appearance this season due to a dreadful knee injury, so the situation is urgent - Palace need quality and quantity. Left-back might be a position Roy Hodgson will look at, Jeffrey Schlupp and Patrick van Aanholt are closer in profile to wing-backs than full-back and Palace might want a more conservative option. Julian Speroni might be a fan's favourite, but after Wayne Hennessey's recent dip in form Palace need a new No.1.
Possible targets:Diego Lopez, Harry Arter, Islam Slimani, Benik Afobe.
Everton
Sam Allardyce has seen a turnaround in Everton's form since arriving and will have identified areas where is team is weak. Clearly, pace and width is an issue and even with Yannick Bolasie returning from injury.
A lack of goals is the main problem and to score them you need a finisher and a creator. Could Theo Walcott be tempted by a move north? Even a loan move might do wonders for his wilting World Cup hopes, and the pace and direct wide play he'd offer supplying crosses for the striker Allardyce will also surely look to sign makes sense.
That striker could well be Christian Benteke but with Roy Hodgson in the middle of a relegation escape, Crystal Palace would be mad to sell the Belgian, no matter how many penalties he misses. Steven Nzonzi is another linked with the club but is less of a priority than Everton's attack, while Ashley Williams' dreadful season could inspire a bid for a reliable centre-back.
Jonny Evans, linked with every club who aren't West Brom, could be an option and who would blame another of Burnley's impressive centre-backs joining Michael Keane and getting the band back together? James Tarkowski would be cheaper and more attainable than many other defensive Premier League stars. Cheaper still might be Lamina Kone at Sunderland, who has already worked with Allardyce.
Potential targets: Lamina Kone, Steven Nzonzi, Christian Benteke, Theo Walcott, Jonny Evans, James Tarkowski and *whisper it* Daniel Sturridge.
Huddersfield
David Wagner's side have proved capable of competing in the Premier League but they will know there is a long way to go just yet, and the squad could yet do with some improving.
Jonas Lossl, the Huddersfield keeper, on loan from Mainz, shows flashes of brilliance but he is too error prone and without any real competition, his position isn't too often challenged.
Potential targets: The most obvious candidate to vie for the goalkeeper spot would be Danny Ward, who played the majority of last season on loan from Liverpool as Huddersfield were promoted to the top flight. He is third-choice at Anfield so why not go back in for him?
Leicester
Whoever Leicester sign (if any) in January, they'll be sure to get things finalised before the deadline having paid the price for a few seconds' delay in the paperwork of Adrien Silva. He'll count as a new signing and with Leicester looking fairly settled for a mid-table finish this season, will surely not feel pressured into making any drastic changes during the window.
It's unclear as to how Claude Puel sees this team developing but a replacement but some talented squad players would certainly help and certainly ones in central defence. A new partner for Harry Maguire? A better right-back?
It depends on the ambition of Leicester's owners and the skill of the scouts - candidates exist but is there any point in leaving a mid-table club to join another (other than the signing-on fee)? Is it worth paying an inflated price in January for someone you don't urgently need but could sort of do with?
Potential targets: Jonny Evans, Lokomotiv Moscow's centre-back Solomon Kvirkvelia, Lamina Kone.
Liverpool
A lot is made of Liverpool's supposed defensive weakness but £75m signing Virgil van Dijk could end up with the same familiar problem of being exposed by players higher up the pitch. Jurgen Klopp could do with an old-school number four, a holding defensive midfielder who can provide protection, better reads the game and can hit a pass or two from deep.
Naby Keita will join the club in the summer and it wouldn't be a surprise if RB Liepzig allowed him to leave sooner. Stranger things have happened.
Potential targets: Julian Weigl from Borussia Dortmund, Ruben Neves from Wolves, Riechedly Bazoer of Wolfsburg.
Manchester City
Despite appearing so far ahead of the chasing pack that it feels like Pep Guardiola's stunning side might end up lapping some other clubs, the race is still on and Man City intend to keep their foot firmly on the accelerator.
Fernandinho has been outstanding this season but when he's not around City don't function in quite the same way and a suitable deputy, or squad rotation member could help. Julian Weigl or someone similarly capable of the deep-lying, short-passing game required would fit the bill.
Guardiola had apparently identified Virgil Van Dijk and Alexis Sanchez as two players he wants to help City win every trophy in the land, but Van Dijk has gone to Liverpool and Sanchez would be really expensive form a player with only six months left on his contract, though injuries to Gabriel Jesus and Kevin De Bruyne may force his hand. Jonny Evans is another heavily linked with a move and would be welcome in a squad slightly weak (in the weakest sense of the word) in depth at centre-back.