The transfer window remains open for the last few days of January and we're expecting plenty of new signings to be brought in by Premier League clubs.
The big story this month surrounded the futures of Alexis Sanchez and Henrikh Mkhitaryan, who traded places at Manchester United and Arsenal.
Liverpool have also been busy, selling Philippe Coutinho to Barcelona but addressing their defensive issues by signing Virgil van Dijk.
With all that said, here's your definitive, all-inclusive, club-by-club guide to all deals completed by Premier League clubs this month.
1. Arsenal
IN
Konstantinos Mavropanos (PAS Giannina) Undisclosed
Henrikh Mkhitaryan (Manchester United) Exchange
OUT
Stephy Mavididi (Charlton Athletic) Loan
Francis Coquelin (Valencia) £12m
Tafari Moore (Wycombe Wanderers) Loan
Theo Walcott (Everton) £20m
Alexis Sanchez (Manchester United) Exchange
Kelechi Nwakali (MVV Maastricht) Loan
Ben Sheaf (Stevenage) Loan
2. AFC Bournemouth
IN
None
OUT
Aaron Ramsdale (Chesterfield) Loan
Mihai Dobre (Rochdale) Loan
Ollie Harfield (Boreham Wood) Loan
Baily Cargill (Partick Thistle) Loan
3. Brighton & Hove Albion
IN
Viktor Gyokeres (IF Brommapojkarna) Undisclosed
Warren O'Hora (Bohemians) Undisclosed
Jurgen Locadia (PSV Eindhoven) £14m
OUT
Jordan Maguire-Drew (Coventry City) Loan
Jamie Murphy (Rangers) Loan
Soufyan Ahannach (Sparta Rotterdam) Loan
Kazenga LuaLua (Sunderland) Free
4. Burnley
IN
Georges-Kevin N'Koudou (Tottenham Hotspur) Loan
Aaron Lennon (Everton) Undisclosed
OUT
Jimmy Dunne (Accrington Stanley) Loan
Luke Hendrie (Shrewsbury Town) Undisclosed
Josh Ginnelly (Tranmere Rovers) Loan
Dan Agyei (Blackpool) Loan
Alex Whitmore (Chesterfield) Undisclosed
Harry Flowers (Guiseley) Undisclosed
5. Chelsea
IN
Ross Barkley (Chelsea) £15m
OUT
Diego Costa (Atletico Madrid) Undisclosed
Ike Ugbo (MK Dons) Loan
Jake Clarke-Salter (Sunderland) Loan
Kenedy (Newcastle) Loan
Nathan (Belenenses) Loan
6. Crystal Palace
IN
Erdal Rakip (Benfica) Loan
Jaroslaw Jach (Zagłębie Lubin) Undisclosed
OUT
Noor Husin (Notts County) Undisclosed
Keshi Anderson (Swindon Town) Undisclosed
Andre Coker (Maidstone United) Loan
7. Everton
IN
Cenk Tosun (Besiktas) £27m
Theo Walcott (Arsenal) Undisclosed
OUT
Gethin Jones (Fleetwood Town) Undisclosed
Ross Barkley (Chelsea) £15m
Liam Walsh (Bristol City) Undisclosed
Kevin Mirallas (Olympiacos) Loan
Harry Charsley (Bolton Wanderers) Loan
Aaron Lennon (Burnley) Undisclosed
8. Huddersfield Town
IN
Terence Kongolo (Monaco) Loan
Alex Pritchard (Norwich City) Undisclosed
OUT
Fraser Horsfall (Kidderminster Harriers) Undisclosed
Ryan Schofield (AFC Telford) Loan
Tadhg Ryan (Released)
Jack Payne (Blackburn Rovers) Loan
Danny Kane (Cork City) Undisclosed
9. Leicester City
IN
Adrien Silva (Sporting CP) £22m
Fousseni Diabate (Gazalec Ajaccio) Undisclosed
OUT
Raul Uche (Real Betis) Loan
10. Liverpool
IN
Virgil van Dijk (Southampton) £75m
OUT
Corey Whelan (Yeovil Town) Loan
Philippe Coutinho (Barcelona) £142m
Matty Virtue (Notts County) Loan
Cameron Brannagan (Oxford United) Undisclosed
Ryan Kent (Bristol City) Loan
Marko Grujic (Cardiff City) Loan
11. Manchester City
IN
None
OUT
Shay Facey (Northampton Town) Undisclosed
Isaac Buckley (Oxford United) Loan
Marlos Moreno (Flamengo) Loan
Kean Bryan (Oldham Athletic) Loan
Chidi Nwakali (Aberdeen) Loan
12. Manchester United
IN
Alexis Sanchez (Arsenal) Exchange
OUT
James Wilson (Sheffield United) Loan
Henrikh Mkhitaryan (Arsenal) Exchange
Demetri Mitchell (Hearts) Loan
Alex Tuanzebe (Aston Villa) Loan
13. Newcastle United
IN
Kenedy (Chelsea) Loan
OUT
Adam Armstrong (Blackburn) Loan
Ivan Toney (Scunthorpe United) Loan
Kyle Cameron (Queen of the South) Loan
Dan Barlaser (Crewe Alexandra) Loan
Lewis McNall (Gateshead) Loan
14. Southampton
IN
Guido Carrillo (Monaco) £19m
OUT
Virgil van Dijk (Liverpool) £75m
Marcus Barnes (Yeovil Town) Loan
Matt Targett (Fulham) Loan
15. Stoke City
IN
Moussa Niakate (Paris FC) Undisclosed
Moritz Bauer (Rubin Kazan) Undisclosed
Kostas Stafylidis (Augsburg) Loan
OUT
Harry Souttar (Ross County) Loan
16. Swansea City
IN
OUT
Josh Sheehan (Newport County) Free
Tyler Reid (Newport County) Loan
Ryan Blair (Falkirk) Loan
17. Tottenham Hotspur
IN
None
OUT
Georges Kevin N'Koudou (Burnley) Loan
Marcus Edwards (Norwich City) Loan
Cameron Carter-Vickers (Ipswich Town) Loan
Ryan Loft (Exeter City) Loan
18. Watford
IN
OUT
Brandon Mason (Dundee United) Loan
Alex Jakubiak (Falkirk) Loan
Michael Folivi (Boreham Wood) Loan
Charlie Rowan (Accrington Stanley) Loan
Brice Dja Djedje (RC Lens) Loan
Randell Williams (Wycombe Wanderers) Loan
19. West Bromwich Albion
IN
Ahmed Hegazi (Al Ahly) Undisclosed
OUT
Kyle Edwards (Exeter City) Loan
Tahvon Campbell (Forest Green Rovers) Loan
20. West Ham
IN
Joao Mario (Inter) Loan
OUT
Martin Samuelson (Burton Albion) Loan
- 90Min