Four hours of the window remain and we'll run through all of the notable completed deals so far in the Premier League and across Europe.
Premier League
Stefanos Tzimas - FC Nuremburg to Brighton, undisclosed (loaned back to Nuremburg)
James Ward-Prowse - Nottingham Forest to West Ham, loan terminated
Evan Ferguson - Brighton to West Ham, loan
Bundesliga
Diant Ramaj - Ajax to Borussia Dortmund, undisclosed
Kosta Nedeljkovic - Aston Villa to RB Leipzig, loan
Andre Silva - RB Leipzig to Werder Bremen, loan
Finn Jeltsch - Nuremberg to Stuttgart, undisclosed
Tidiam Gomis - SM Caen to RB Leipzig, undisclosed
Serie A
Santiago Gimenez - Feyenoord to AC Milan, undisclosed
Cher Ndour - Paris Saint-Germain to Fiorentina, undisclosed
Nicolo Zaniolo - Galatasaray to Fiorentina, loan
Ivan Smolcic - HNK Rijeka to Como, undisclosed
Reda Belahyane - Verona to Lazio, undisclosed
Ligue 1
Moatasem Al-Musrati - Besiktas to Monaco, loan
Anthony Rouault - Stuttgart to Stade Rennes, undisclosed
Chelsea's Ben Chilwell is set for a potential career-reviving loan move to Crystal Palace until the end of the season.
Frozen out by Blues boss Enzo Maresca, the left-back will strengthen Oliver Glasner's camp as they look to crack the top half of the Premier League.
Chilwell's arrival will provide the green light for Jeffrey Schlupp's departure, who is reportedly heading to Celtic on loan, while Palace central defender Rob Holding is having a medical at Championship promotion contenders Sheffield United.
We're into the closing stages of the winter transfer window and there are still plenty of deals to be done.
Tottenham - Nearing the completion of a deal for Mathys Tel, latest reports indicate that Spurs are reviving a move for Chelsea defender Axel Disasi. The France international had been the subject of interest from Aston Villa.
Manchester City - A deal for Nico Gonzalez is in the works as the defending Premier League champions look set to take their January spending to over £200m with the purchase of the Porto midfielder.
Aston Villa - Marco Asensio is expected to join the Villans on loan from Paris Saint-Germain.
Chelsea - Incomings and outgoings are on the agenda at Stamford Bridge with Joao Felix set to depart on loan, while a deal has been agreed which will see Saint-Etienne teenager Mathis Amougou head to SW5.
Tottenham are on the verge of completing a deal to sign Mathys Tel from Bayern Munich.
Chelsea's Joao Felix is reportedly close to agreeing a six-month loan move to Milan.
With a move to Tottenham appearing imminent, we've suspended betting on Mathys Tel.
The move had been on the cards prior to deadline day with Ferguson undergoing a medical this morning.
No issues have presented themselves, and the Brighton forward will hope to get more minutes under his belt at the London Stadium.
A serious knee injury curtailed his development last season with a recent ankle injury further restricting his game time, but with West Ham desperately needing more forward options, the loan move should suit all parties.
Mathys Tel's agent has posted an image of the Bayern forward on a private plane with London thought to be the destination.
It appears Bayern have backed down over demands for a permanent deal, with Tottenham set to sign the teenager on loan until the end of the season.
Although they were likely already pursuing midfield reinforcements, Manchester City's 5-1 drubbing at the hands of Arsenal on Sunday has certainly emphasised the importance of getting someone in before the transfer window closes.
While none have been forthcoming so far in January, the club have been linked with Porto midfielder Nico Gonzalez.
Find out more about the 23-year-old here.
Despite struggling for game time at Stamford Bridge, Christopher Nkunku looks set to stay at Stamford Bridge until the summer at least.
Reports suggested the 27-year-old could be moved on in January as one of the club's higher earners with Manchester United linked with a loan move.
There's no denying the Frenchman's talents, but his fitness was an issue last season, and he doesn't seem to fit in with Enzo Maresca's plans.
In total, Nkunku has made just five Premier League starts since his move to West London, but it appears he's determined to add to that this term rather than seek football elsewhere.
As seen in the list below, there have been some Premier League greats who've joined the league in the winter, and we delved into some of the best, putting cases forward for who comes out on top.
The Debate: Who is the best Premier League January transfer window signing of all time?
While it feels that more clubs are better run these days than to need to dip into the transfer market in January, a number of the Premier League's best players over the years have made the switch in January, with Virgil van Dijk, Luis Suarez and Nemanja Vidic all joining in the winter.Top 10 January transfers
In what was one of the summer's most protracted transfer sagas, with Newcastle seeing multiple bids for Marc Guehi rejected, Tottenham are the last club to be knocked back by Crystal Palace.
Spurs have already strengthened their back line with the signing of Kevin Danso from Lens, and are looking to add Guehi to their ranks before the England centre-back's contract reaches the one-year mark to expiry in the summer.
Having sent Evan Ferguson out on loan to West Ham for the rest of the season, Brighton have moved to enhance their front line with Stefanos Tzimas signing from PAOK, although the 19-year-old is set to stay in Germany for the rest of the season.
Despite coming through the Tottenham academy, the first most of us heard about Marcus Edwards was during his breakthrough 2022/23 campaign, where he scored against his old club in the UEFA Champions League.
What has been the most volatile market in the January transfer window now appears to and rather anti-climactically, with Mathys Tel odds-on to stay at Bayern Munich.
The France forward made his intention to leave clear as he went in search of more regular football - prompting the rejection of a move to Chelsea, where competition for places is too high.
Arsenal were odds-on, Tottenham looked close to completing the signing, as did Manchester United, now any deal looks to be off.
Reports from Sky in Germany revealed that Bayern have rejected a loan move for Tel, seeking a permanent deal.
One of the most interesting transfer sagas of the winter sees Marcus Rashford make the surprise move to Villa Park.
bet365's Sports and Trading expert Steve Freeth said: "Marcus Rashford has been given the chance to resurrect his career at Aston Villa and we’re looking at how many Premier League goals he’ll score this season with four already to his name.
"Unai Emery is reported to be keen to put an arm around the 27 year-old in a bid to get the best out of him – we make Rashford a 5/1
We have of course seen a potent Rashford in front of goal, scoring 17 goals in the 2019/20 season under Ole Gunnar Solskjaer and reaching the same figure in Erik ten Hag's first campaign, but the 27-year-old has endured a rather miserable 18 months, resulting in his exit from Old Trafford.
A deal sheet? What is that, I hear you ask? Let us explain.
When against the clock, a deal sheet enables a club to request additional time to submit documentation when they're processing a player transfer.
This will likely be a prominent factor in the closing stages of today's Deadline Day as teams attempt to maximise the time available to them in order to complete deals.
Read our full guide on transfer deal sheets
There's nothing that heightens the senses more than a club paying astronomical sums to get a deal over the line in the dying embers of a transfer window.
As clubs plot last-minute transfers to help them achieve their respective goals, find out the 10 most expensive Premier League deals on Deadline Day
With the transfer deadline looming, bet365 currently has four transfer specials available on site.
We will keep you up to date with the latest odds here, so stay tuned via our live blog.
Hello and welcome to bet365's live coverage of Transfer Deadline Day.
The bet365 News team are donning their yellow ties and will be keeping you up to date with all of the latest transfer rumours, odds and confirmed deals as clubs up and down the country strive to enhance their squads before the window concludes.
A hotly-anticipated date on the footballing calendar, this Transfer Deadline Day appears set to be a fascinating occasion with a catalogue of high-profile moves in the offing.
