Check out the latest official transfer list here.
Friday 31 January
VfL Wolfsburg's signing of Kevin De Bruyne has paved the way for Diego to bid farewell to the Wolves. The Brazilian was not named in Dieter Hecking's squad for the encounter with FC Schalke 04 and has instead signed with Club Atletico de Madrid. The deal represents Diego's second spell in Madrid, the club with whom he won the UEFA Europa League during the 2011/12 campaign, but the playmaker was quick to thank the club: "I'd like to thank Wolfsburg, who have agreed to my request to leave."
With the battle for relegation fiercer than ever in the current campaign, strugglers Hamburger SV have jumped at the opportunity to add some much-needed experience to their squad by signing 34-year-old defender Patrick Owomoyela. The former Borussia Dortmund right-back has been without a club for the last six months, working for Sky Germany as a football pundit, but is undoubtedly relishing the opportunity to lace up his boots once again with the Red Shorts.
1. FC Nürnberg have completed their second signing of the transfer window by bringing talented Spanish youngster Jose Campana to der Club from Premier League outfit Crystal Palace FC. The 20-year-old has joined on a six-month loan deal that includes an option to make the move permanent in the summer. "We regularly kept an eye on Jose Campana, especially when he featured for the Spanish national team's youth sides," explained sporting director Martin Bader. "He can play in a variety of midfield positions."
It may not be a transfer deal per se, but there has nevertheless been another development on the personnel front in Stuttgart. The club tweeted that contract talks with "had failed" and that the winger will leave the Swabians at the end of the season. Sporting director Fredi Bobic commented: "I'm confident he'll give his all right up until the last day. He's got a great character."
New Stuttgart midfielder Carlos Gruezo is in Swabia and has been handed his new shirt, posing with sporting director Fredi Bobic for the mandatory picture. There is a smile in there somewhere…
Could former Borussia Dortmund defender Patrick Owomoyela be in line for a comeback? The 34-year-old has been working as a television pundit in Germany since hanging up his boots last year, but his name is on the latest official transfer list. Watch this space...
Werder Bremen managed to squeeze in a deal before the close of business too, with Polish international Ludovic Obraniak putting pen to paper on a two-and-a-half year contract with the Green-Whites. The 29-year-old, who joins from French club Girondins Bordeaux, is a left-footed midfielder "who will further strengthen our attack," according to Bremen coach Robin Dutt. Incidentally, the coach revealed that former Bremen and France midfielder Johan Micoud had drawn his attention to Obraniak as a transfer target.
Borussia Dortmund have added another attacking midfielder to their ranks, with Milos Jojic now a fully paid-up member of the BVB squad, although he will not feature in tonight's Matchday 19 opener against Eintracht Braunschweig. Check out the newcomer with sporting director Michael Zorc:
1899 Hoffenheim have also pruned their squad today, with 32-year-old French defender Matthieu Delpierre on his way to the Netherlands to top-flight side FC Utrecht.
The first move of the day is that of Croatian striker , who will be leaving Eintracht Frankfurt. In a tweet this morning the 30-year-old said: "Dear fans, it's now confirmed that I'll be moving to 1. FC Kaiserslautern. Official statement at 14:00 [CET]:
Geschätzte Fans, jetzt steht es fest dass ich nach 1. FC Kaiserslautern wechsle. Öffizielles Statement um 14:00... http://t.co/98yxTBxa0e— Srdjan Lakic (@SrdjanLakic9) 31. Januar 2014
Thursday 30th January
With the positive experience of Daniel Carvajal still fresh in the memory, Bayer 04 Leverkusen have looked to Spain once again by bringing in Andres Guardado from Valencia CF on loan until the end of the season. "We're convinced he will give our team a further boost," said the club's sporting director Rudi Völler. The Mexican midfielder said that the "Bundesliga has a fantastic reputation in Spain."
Jermaine Jones has left FC Schalke 04 to join Turkish outfit Besiktas JK. The USA international made a total of 129 Bundesliga appearances for the Royal Blues, but the 32-year-old has struggled for first-team opportunities under Jens Keller this season. Jones is now hoping to impress for his new club, who are currently fifth in the Turkish Süper Lig.
A number of deals were concluded on Thursday, with VfB Stuttgart duo William Kvist and Cristian Molinaro deciding to seek pastures new. Danish midfielder Kvist has joined English Premier League side Fulham FC on loan until the end of the season, while Italian defender Molinaro has signed a permanent deal with Parma FC in his homeland. Stuttgart added to their squad, however, with the signing of Ecuadorian youngster Carlos Gruezo.
As usual, you can be the first to know about any transfers by following us on Twitter. We will be tweeting all of the latest deals throughout the day before the ink has even dried on the contracts.
For a handy overview of all the transfers to have gone through since the window opened at the beginning of January, click here.
Few will doubt what the biggest transfer during this transfer window has been. VfL Wolfsburg's signing of Kevin De Bruyne from Chelsea FC sent out a clear signal to the Wolves' Bundesliga rivals: the 2009 Bundesliga champions mean business. With the Belgian back in the Bundesliga, Wolfsburg are clearly aiming for a return to Europe next season, but will this one transfer give them the edge they are looking for?
It will not officially go down as a winter transfer, but January was the month when FC Bayern München confirmed they had agreed terms with Robert Lewandowski, who will be moving to Bavaria once his current contract with Borussia Dortmund expires at the end of June. The Polish striker is nevertheless committed to doing his best for Dortmund until the end of the season. Could he yet be joined by a new team-mate for those remaining months?
So how exactly does the transfer window work? What are the procedures which have to be followed? Our handy transfer guide should have an answer to all of your questions.