The January transfer window is set to close in little over a week and time is running out for clubs to bring in new additions.

With the Premier League season more competitive than ever the battle for supremacy in England's top flight is very much a squad game.

A starting XI capable of going toe-to-toe with the best is no longer enough, back-up options have become a necessity for managers.

However, not everyone has managed to get their preferred starting line-up sorted out ahead of the second half of the season.

West Ham may occupy sixth place in the Premier League table but Slaven Bilic has not been able to field a settled front line all season.

Andy Carroll keeps on getting injured while Diafra Sakho has also been forced to spend a fair amount of time on the sidelines.

So too has Enner Valencia, who scored twice during the 2-2 draw with Manchester City last time out.

Nikica Jelavic has failed to convince while Mauro Zarate has joined Fiorentina, all of which means the Hammers are in the market for a forward.

Transfer Window: London's big deals 24 show all Transfer Window: London's big deals 1/24



Mohamed Elneny

to Arsenal The 23-year-old joined the Gunners from Swiss side Basel after making over 90 league appearances for the club and winning three consecutive Super League titles. An experienced Egyptian international, Elneny can operate in several midfield roles and will provide Arsene Wenger with a versatile option in the centre of the park. Getty Images 2/24



Steven Caulker

to Liverpool The 24-year-old spent the first half of the season on loan at Southampton but completed a short-term switch to Anfield to provide Jurgen Klopp with defensive cover. Having struggled for game time on the South Coast, the England international will be keen to impress. Reuters 3/24 Matt Jarvis to Norwich With West Ham boasting a wealth of midfield options, Jarvis completed a season-long loan move to Carrow Road last summer. The 29-year-old impressed sufficiently enough to earn a three-and-a-half year permanent deal earlier this month. An astute signing from the Canaries. Rex 4/24 Jack Hunt to Sheffield Wednesday The 25-year-old full-back never played a competitive game for Crystal Palace after joining the south Londoners from Huddersfield Town in 2013. He joined the Owls on loan last Augist and, after making 22 appearances in all competitions, was rewarded with a three-and-a-half year permanent deal. Rex 5/24



Charlie Austin

to Southampton The 26-year-old was set to become a free agent in the summer but QPR secured a fee for his services after he completed a move to Southampton earlier in the month. Austin had attracted interest from several sides and Ronald Koeman has got his hands on a forward who scored a healthy 18 goals in his only season at the top level. Getty Images 6/24 Alessandro Diamanti to Atalanta (on loan) The 32-year-old midfielder made just three substitute appearances for Watford after arriving in August. The former Italy international, who won 17 senior caps for the Azzurri, has joined Serie A side Atalanta on loan until the end of the season. EPA 7/24 Diego Poyet to Charlton (on loan) The Championship strugglers have re-signed Poyet on loan after the midfielder was recalled from his initial loan spell at MK Dons by parent club West Ham. The 20-year-old came through the Valley's youth ranks but joined the Hammers in the summer of 2014. He will remain in south-east London until the end of the season. Getty Images 8/24



Mauro Zarate

to Fiorentina The forward started the season in memorable fashion, netting in a 2-0 victory over Arsenal, but has signed for Serie A club Fiorentina on a permanent basis. The 28-year-old's fee is reported to be £1.5m. 9/24



Sam Byram

to West Ham The 22-year-old appeared to be destined for a move to Everton earlier in the transfer window but eventually chose to move to the Boleyn Ground. The former Leeds full-back may have grown up in Yorkshire but he was born in Essex and members of his family are Hammers fans. 10/24



Shilow Tracey

to Tottenham The 17-year-old midfielder was monitored by Charlton Athletic, Crystal Palace and West Ham this month but committed his long-term future to Spurs after rising to prominence with National South side Ebbsfleet United. The north Londoners will be hoping they have unearthed another Dele Alli. 11/24



Emmanuel Adebayor

to Crystal Palace The Togo forward has penned a shot-term deal with Alan Pardew's side, who have been short of goals in recent weeks. The former Arsenal, Spurs and Manchester City striker has a wealth of experience and could be just the ticket for the south Londoners during the second half of the season. 12/24



Andros Townsend

to Newcastle The England international was previously seen as one of Tottenham's most promising prospects, but fell out of favour under Mauricio Pochettino. Banished to the Under-21s after a bust up with one of the club's fitness coaches, Townsend's spell at White Hart Lane was brought to an end after he completed a £12m switch to Tyneside five days before the transfer deadline. 13/24



Ramires

to Jiangsu Suning A surprise departure but at £25million Chelsea could hardly say no to a sizeable profit on a player who was at best a squad member. 14/24



Alexandre Pato

to Chelsea Chelsea have taken a six-month gamble on the former AC Milan striker, who spent last season on loan with Sao Paulo. Pato will compete with Diego Costa for a first-choice striking role. 15/24



Sandro

to QPR The QPR midfielder has joined West Brom on loan with a view to a permanent summer move. Sandro has made just 11 appearances for Rangers in the Championship this season following the club's relegation from the Premier League last term. 16/24



Mario Suarez

to Watford The 28-year-old has signed a four-and-a-half-year deal at Vicarage Road and joins from Serie A side Fiorentina for an undisclosed fee, understood to be around £4million. 17/24



Matt Miazga

to Chelsea The 20-year-old defender arrives from MLS side New York Red Bulls, and has signed a four-and-a-half year contract at Stamford Bridge. Dave Thompson/Getty Images 18/24



Patrick Bamford

to Norwich City The academy graduate moves to Carrow Road on loan after only recently returning to Chelsea after deciding to cancel his stint at Crystal Palace after failing to cement his place in Alan Pardew's side. 19/24



Emmanuel Emenike

to West Ham The 28-year-old Nigerian international arrives from Fenerbahce, though he has spent this season on loan at Al Ain in the United Arab Emirates league. 20/24



Alex Prtichard

to West Brom The Tottenham man has joined West Brom on loan until the end of the season in a bid to get more game time. Pritchard was at Brentford last term, where he scored 12 Championship goals in 45 starts as the Bees made the play-offs. 21/24



Federico Fazio

to Sevilla (loan) The 28-year-old only signed for the north Londoners from the La Liga outfit in the summer of 2014 but has failed to establish himself at White Hart Lane. 22/24



Abdoulaye Doucoure

to Watford The 23-year-old midfielder signed for Watford only to immediately be sent out on loan to felllow Pozzo club Granada. 23/24



Mathieu Debuchy

to Bordeaux (loan) After a frustrating 18 months at Arsenal that saw Hector Bellerin comprehensively overtake him in Arsene Wenger's affections. He moves to Bordeaux on loan in the hope of securing his spot in Didier Deschamps' France side. 24/24



Yaya Sanogo

to Charlton (loan) Arsene Wenger had hoped that a spell at Ajax would sharpen Sanogo's striking instincts. He didn't start a single game and has now moved on to Charlton. They have had previous success with Arsenal loanees, with Francis Coquelin returning to the Emirates and establishing himself as a crucial first-teamer. 1/24



Mohamed Elneny

to Arsenal The 23-year-old joined the Gunners from Swiss side Basel after making over 90 league appearances for the club and winning three consecutive Super League titles. An experienced Egyptian international, Elneny can operate in several midfield roles and will provide Arsene Wenger with a versatile option in the centre of the park. Getty Images 2/24



Steven Caulker

to Liverpool The 24-year-old spent the first half of the season on loan at Southampton but completed a short-term switch to Anfield to provide Jurgen Klopp with defensive cover. Having struggled for game time on the South Coast, the England international will be keen to impress. Reuters 3/24 Matt Jarvis to Norwich With West Ham boasting a wealth of midfield options, Jarvis completed a season-long loan move to Carrow Road last summer. The 29-year-old impressed sufficiently enough to earn a three-and-a-half year permanent deal earlier this month. An astute signing from the Canaries. Rex 4/24 Jack Hunt to Sheffield Wednesday The 25-year-old full-back never played a competitive game for Crystal Palace after joining the south Londoners from Huddersfield Town in 2013. He joined the Owls on loan last Augist and, after making 22 appearances in all competitions, was rewarded with a three-and-a-half year permanent deal. Rex 5/24



Charlie Austin

to Southampton The 26-year-old was set to become a free agent in the summer but QPR secured a fee for his services after he completed a move to Southampton earlier in the month. Austin had attracted interest from several sides and Ronald Koeman has got his hands on a forward who scored a healthy 18 goals in his only season at the top level. Getty Images 6/24 Alessandro Diamanti to Atalanta (on loan) The 32-year-old midfielder made just three substitute appearances for Watford after arriving in August. The former Italy international, who won 17 senior caps for the Azzurri, has joined Serie A side Atalanta on loan until the end of the season. EPA 7/24 Diego Poyet to Charlton (on loan) The Championship strugglers have re-signed Poyet on loan after the midfielder was recalled from his initial loan spell at MK Dons by parent club West Ham. The 20-year-old came through the Valley's youth ranks but joined the Hammers in the summer of 2014. He will remain in south-east London until the end of the season. Getty Images 8/24



Mauro Zarate

to Fiorentina The forward started the season in memorable fashion, netting in a 2-0 victory over Arsenal, but has signed for Serie A club Fiorentina on a permanent basis. The 28-year-old's fee is reported to be £1.5m. 9/24



Sam Byram

to West Ham The 22-year-old appeared to be destined for a move to Everton earlier in the transfer window but eventually chose to move to the Boleyn Ground. The former Leeds full-back may have grown up in Yorkshire but he was born in Essex and members of his family are Hammers fans. 10/24



Shilow Tracey

to Tottenham The 17-year-old midfielder was monitored by Charlton Athletic, Crystal Palace and West Ham this month but committed his long-term future to Spurs after rising to prominence with National South side Ebbsfleet United. The north Londoners will be hoping they have unearthed another Dele Alli. 11/24



Emmanuel Adebayor

to Crystal Palace The Togo forward has penned a shot-term deal with Alan Pardew's side, who have been short of goals in recent weeks. The former Arsenal, Spurs and Manchester City striker has a wealth of experience and could be just the ticket for the south Londoners during the second half of the season. 12/24



Andros Townsend

to Newcastle The England international was previously seen as one of Tottenham's most promising prospects, but fell out of favour under Mauricio Pochettino. Banished to the Under-21s after a bust up with one of the club's fitness coaches, Townsend's spell at White Hart Lane was brought to an end after he completed a £12m switch to Tyneside five days before the transfer deadline. 13/24



Ramires

to Jiangsu Suning A surprise departure but at £25million Chelsea could hardly say no to a sizeable profit on a player who was at best a squad member. 14/24



Alexandre Pato

to Chelsea Chelsea have taken a six-month gamble on the former AC Milan striker, who spent last season on loan with Sao Paulo. Pato will compete with Diego Costa for a first-choice striking role. 15/24



Sandro

to QPR The QPR midfielder has joined West Brom on loan with a view to a permanent summer move. Sandro has made just 11 appearances for Rangers in the Championship this season following the club's relegation from the Premier League last term. 16/24



Mario Suarez

to Watford The 28-year-old has signed a four-and-a-half-year deal at Vicarage Road and joins from Serie A side Fiorentina for an undisclosed fee, understood to be around £4million. 17/24



Matt Miazga

to Chelsea The 20-year-old defender arrives from MLS side New York Red Bulls, and has signed a four-and-a-half year contract at Stamford Bridge. Dave Thompson/Getty Images 18/24



Patrick Bamford

to Norwich City The academy graduate moves to Carrow Road on loan after only recently returning to Chelsea after deciding to cancel his stint at Crystal Palace after failing to cement his place in Alan Pardew's side. 19/24



Emmanuel Emenike

to West Ham The 28-year-old Nigerian international arrives from Fenerbahce, though he has spent this season on loan at Al Ain in the United Arab Emirates league. 20/24



Alex Prtichard

to West Brom The Tottenham man has joined West Brom on loan until the end of the season in a bid to get more game time. Pritchard was at Brentford last term, where he scored 12 Championship goals in 45 starts as the Bees made the play-offs. 21/24



Federico Fazio

to Sevilla (loan) The 28-year-old only signed for the north Londoners from the La Liga outfit in the summer of 2014 but has failed to establish himself at White Hart Lane. 22/24



Abdoulaye Doucoure

to Watford The 23-year-old midfielder signed for Watford only to immediately be sent out on loan to felllow Pozzo club Granada. 23/24



Mathieu Debuchy

to Bordeaux (loan) After a frustrating 18 months at Arsenal that saw Hector Bellerin comprehensively overtake him in Arsene Wenger's affections. He moves to Bordeaux on loan in the hope of securing his spot in Didier Deschamps' France side. 24/24



Yaya Sanogo

to Charlton (loan) Arsene Wenger had hoped that a spell at Ajax would sharpen Sanogo's striking instincts. He didn't start a single game and has now moved on to Charlton. They have had previous success with Arsenal loanees, with Francis Coquelin returning to the Emirates and establishing himself as a crucial first-teamer.

The east Londoners have set their sights on Sporting Lisbon's Islam Slimani, according to reports in the Portuguese press.

West Ham are believed to have sent scouts to watch the striker, who is also said to have attracted interest from Crystal Palace, Manchester United, Liverpool, Udinese and Borussia Dortmund this month.

For more on this story - and others - check out our transfer blog below!

Please wait a moment to allow the blog to load.