The latest news and gossip from European football's winter transfer window.
Transfer talk: January 4 - Demba Ba seals Chelsea move
Demba Ba insisted it was an easy decision to sign for the Champions League winners after his move to Chelsea was confirmed by the club.
The Senegal striker has signed a three-and-a-half-year contract after his move from Newcastle for an undisclosed fee. The London club had triggered a £7million (Dh 41.2m) release clause in his Magpies contract.
Ba, 27, who will be eligible for selection for the FA Cup third-round match at Southampton, will wear the No 29 shirt.
He told Chelsea's official website: "It feels good to be here, I'm very happy and very proud.
"When the club who won the Champions League wants you, the decision is very easy. This club is massive and that's something that helped the decision a lot. It was not a hard one.
"It was important for me, and for Newcastle, to get my future sorted and now we can move on. Now they have the whole month to buy someone and for me as well, the sooner the better. Now I am here I just need to get settled in."
Tottenham Hotspur have won the race to sign highly-rated Germany international Lewis Holtby from Schalke.
The 22-year-old midfielder, whose father Chris is from Liverpool, will move to White Hart Lane at the end of the season when his contract expires with the German club.
A Spurs statement read: "We are delighted to announce that we have reached agreement with Germany Under-21 captain Lewis Holtby to join the club in July from Bundesliga side Schalke, subject to a medical."
Hammers manager Sam Allardyce confirmed that the Moroccan has completed his move across London - but not in time to figure in the FA Cup third-round tie against Manchester United at Upton Park.
Allardyce told Sky Sports News: "We've signed him for the rest of the season. I think that'll be it in terms of strikers as we need to get Andy Carroll back (to fitness).
Chamakh, 28, struggled to claim a regular place in the Gunners' first team after initially impressing following a free transfer from Bordeaux in 2010.
The Hammers also expect to have new signing Joe Cole available for the FA Cup third-round tie against Manchester United at Upton Park after his free transfer from Liverpool was confirmed.
Newcastle United have completed the signing of France international full-back Mathieu Debuchy.
The 27-year-old defender has joined the Magpies from Lille for an undisclosed fee, and has signed a five-and-a-half-year contract.
Debuchy, who has 12 senior international caps, will wear the No 26 shirt at St James' Park, but will not be included in the squad for the FA Cup third-round trip to Brighton.
Debuchy's capture will come as a boost to manager Alan Pardew, whose side has leaked 13 goals in their last three Premier League games amid a dreadful run of form.
Pardew has been trailing the full-back, a close friend of midfielder Yohan Cabaye, for some time, but was unable to push through a deal last summer.
The manager said: "We are absolutely delighted to have finally secured the signature of Mathieu."
Fulham manager Martin Jol has confirmed the signing of FC Twente's Chris David.
The 19-year-old midfielder has long been linked with the Craven Cottage outfit and has now completed his move.
David has represented Holland at youth levels and was close to a move to Fulham in the summer.
"He is here," Jol said of David. "He has signed and he is here.
"He trained with us this morning. He is 19 years of age, player of the year of all the academies in Holland.
"He is an exciting talent but he will need at least six months of a year to adapt, but hopefully he will do it quicker. He is a very, very good talent.