The transfer window is open! Clubs around the UK and Europe have one final chance to strengthen their squads for the second half of the season.

Monday morning's headlines:

Alexis Sanchez 'completes Manchester United move'
Arsenal forward Alexis Sanchez reportedly finalises terms with Manchester United ahead of his imminent £30m move to Old Trafford. Read more.

Chelsea 'considering Andy Carroll loan'
Chelsea are reportedly still considering an approach for West Ham United striker Andy Carroll this month as they look to bolster their attacking options. Read more.

Jose Mourinho: 'Manchester United must keep David de Gea'
Manchester United manager Jose Mourinho confirms that the club will offer David de Gea a new contract in a bid to ward off interest from Real Madrid. Read more.

Pierre-Emerick Aubameyang 'agrees terms with Arsenal'
Wantaway Borussia Dortmund striker Pierre-Emerick Aubameyang reportedly agrees terms with Arsenal over a lucrative January switch to the Emirates Stadium. Read more.

Arsene Wenger: 'Alexis Sanchez future to be decided in next 48 hours'
Arsene Wenger admits that Alexis Sanchez's future at Arsenal "will be decided in the next 48 hours". Read more.

Arsene Wenger describes Alexis Sanchez future at Arsenal as "half in, half out"
Arsenal boss Arsene Wenger claims that Alexis Sanchez is currently "half in, half out" at the club amid reports of an imminent move to Manchester United. Read more.

Newcastle United 'make fresh approach for Pepe Reina'
A report claims that Pepe Reina is still on Newcastle United's radar, but Napoli are holding out for a transfer fee of £10m for the goalkeeper. Read more.

RB Leipzig formally rule out early Naby Keita to Liverpool switch
RB Leipzig confirm that midfielder Naby Keita will remain at the club until the summer, as they categorically rule out an early move to Liverpool. Read more.

Crystal Palace to bring in Vicente Guaita from Getafe?
Crystal Palace hope to bring in £3.5m-rated goalkeeper Vicente Guaita from Getafe in the coming days, according to a report. Read more.

Manchester United boss Jose Mourinho: "Every player has a price"
Jose Mourinho suggests that he is willing to sell Manchester United playmaker Henrikh Mkhitaryan this month if an interested club makes a reasonable offer. Read more.

Arsene Wenger: 'Alexis Sanchez decision imminent'
Arsene Wenger confirms that a decision over the future of Alexis Sanchez is close to being made, having omitted the Chilean forward from his squad to face Bournemouth. Read more.

Report: Alexis Sanchez not in Arsenal squad for Bournemouth game
Alexis Sanchez is believed to be out of the Arsenal squad for their game at Bournemouth ahead of a potential move away from the Emirates Stadium. Read more.

Report: West Ham United interested in Everton youngster Tom Davies
Premier League side West Ham United are reportedly looking to sign Everton youngster Tom Davies in January. Read more.

Report: Arsenal quoted £45m for Bordeaux star Malcom
Ligue 1 side Bordeaux reportedly quote Arsenal a fee of £45m for highly-rated young Brazilian attacker Malcom. Read more.

Report: Liverpool keen on Sporting Lisbon winger Martins
Liverpool are believed to be interested in signing Sporting Lisbon winger Gelson Martins in January. Read more.

Report: Manchester City monitoring Lille midfielder Boubakary Soumare
Manchester City are believed to be keeping tabs on 18-year-old Lille midfielder Boubakary Soumare as a long-term replacement for Yaya Toure. Read more.

Report: Liverpool enter race to sign Arsenal forward Alexis Sanchez
Liverpool are believed to have entered the race to sign wantaway Arsenal forward Alexis Sanchez from under the noses of Manchester City and Manchester United. Read more.

Report: Alexis Sanchez given Friday deadline to join Manchester United
Manchester United will withdraw their interest in Alexis Sanchez if the Arsenal forward does not decide to join the Red Devils by Friday, according to a report. Read more.