Bleacher Report presents a power ranking of January's 20 hottest transfer rumours.
Which Real Madrid star has reportedly fallen out with Florentino Perez?
Barcelona are looking to sign which Manchester City player?
Which struggling Paris Saint Germain player has rubbished rumours of him leaving the club?
According to Gianlucadimarzio.com, Guangzhou Evergrande manager Marcello Lippi is thinking about signing Juventus' Fabio Quagliarella.
However, Quagliarella's agent said his client will not be leaving Juve in the January transfer window, per ITV.
Quagliarella has been an impact sub this season for Juve, coming off the bench in seven of nine league games.
Schalke defensive midfielder Jermaine Jones might run down his contract.
"I am on a Schalke deal that will run out at the end of the season," Jones said, via Leander Schaerlaeckens at FOX Sports."I will not decide on my future ahead of the FIFA World Cup tournament."
Jones is one of those "kick anything that moves" midfielders, so it's not a surprise he has picked up six yellow cards in his last 10 games.
Turkish national team manager Fatih Terim weighed in on struggling La Liga side Real Betis potentially signing Galatasaray's Albert Riera, the former Liverpool player.
"The other day I read in the newspapers that [Betis] were interested in [Albert Riera] and I was very surprised," Terim said, via Tom Conn at Inside Spanish Football.
"It sounded like Betis wanted to take Riera on a loan from January to May for just €250,000 when he is currently making €1.5 million."
Sao Paulo midfielder Ganso will stay at the club, even though he is being chased by several major clubs.
Ganso said, from Esporte Interativo via Paulo Freitas at Sky Sports: "I still have a lot to achieve at Sao Paulo, so there is very little chance I will be leaving now."
Once considered equals with Neymar at Santos, Ganso's career has stalled due to injuries and performance issues.
Spartak Moscow want to sign Real Valladolid's Patrick Ebert, according to talkSPORT.
Real Valladolid sporting director Alberto Marcos said it's unlikely Ebert will leave in the January transfer window.
"The departure of Patrick in the winter is not feasible for us," Marcos said, via Football Espana. "It has to be a significant sum to allow him to leave in the market."
Ebert, an incisive passer on the right wing, has scored three goals and created another four in 10 league games this season.
Napoli are targeting Schalke's right attacking midfielder Jefferson Farfan, according to La Republica via Inside Futbol.
This rumour makes no sense because Napoli's Jose Callejon is one of the best right-sided midfielders in Serie A, having scored seven league goals this season (three more than Mario Balotelli).
Zenit Saint Petersburg's Domenico Criscito will not be returning to Serie A, according to his agent.
"It's too soon to talk about a transfer," Criscito's agent Andrea D’Amico told TMW via Football Italia. "There is a lot of interest in him, but he has a contract at Zenit until June 2016."
Criscito has been competing with Cristian Ansaldi for the Zenit left-back spot.
Hamburg general manager Oliver Kreuzer says the club do not want to sell Hakan Calhanoglu, who has become a transfer target for Galatasaray.
"We do not have any interest in selling him. Hakan is keen on making himself a name in the Bundesliga," Kreuzer said, from Hamburger Abendblatt via Thomas Zocher at Sky Sports. "Of course, every player has a price."
Calhanoglu, a left winger who can also play behind the No. 9 (Pierre-Michel Lasogga), has scored twice in his last three league games.
Sunderland outcast Ji Dong-Won's second successive loan stint at Augsburg is still up in the air, according to Augsburg general manager Stefan Reuter.
"It is no secret that Ji had a great season playing for Augsburg," Reuter said, via Chris Young at The Shields Gazette. "Basically, we are keeping our eyes and ears open, but I’m not a fan of transfers during the winter break."
Reuter might not be a fan of winter window transfers, but in what period did Ji arrive last season?
Inter Milan owner Erick Thohir wants to make a big first impression by signing Manchester City's Stevan Jovetic or Southampton's Dani Osvaldo, according to Sky Sport Italia via Football Italia.
Neither target is realistic, but Osvaldo's teammate, Gaston Ramirez, who wants to leave, should be a transfer target for Inter.
Real Madrid manager Carlo Ancelotti revealed centre-forward Alvaro Morata will not be loaned to Arsenal during the January transfer market.
"Morata remains with us because we need a footballer like him at Real Madrid this season," Ancelotti said, from Esradio via Francisco Acedo at Sky Sports.
"Although he has not played many matches this season I have confidence in his work for the team."
Should Karim Benzema suffer an injury, Real Madrid would be left with no true No. 9, which is why Ancelotti is against loaning Morata out in January.
Inter Milan midfielder Mateo Kovacic may seek a loan in January to be a starter week in, week out, according to Football Italia.
Kovacic has failed to displace Ricky Alvarez in the No. 10 position.
While in midfield, Kovacic is competing with Esteban Cambiasso, Fredy Guarin and Saphir Sliti Taider for starts.
In 13 league games for Inter this season, Kovacic has only started five games.
Wolfsburg centre-forward Ivica Olic could move to the MLS after the 2014 FIFA World Cup.
"The decision on what's next in my career will have to be made after the 2014 FIFA World Cup," Olic said, from Frankfurter Allgemeine Sonntagszeitung via Sky Sports.
"At this point in time everything is fine enough to say I will continue being a professional. Maybe this is in the Bundesliga, but it's still a dream of mine to play in the United States."
Age is just a number to Olic who is still tripping up opposing defenders, throwing himself into aerial contests and scoring goals (six in 14 league games).
Arsenal and Manchester City are both interested in bringing back Lokomotiv Moscow's Lassana Diarra, according to Ben Jefferson at The Express.
Diarra, a modern-day mercenary (six different clubs since 2005)—who only signed with Lokomotiv Moscow this year—will only be tempted by a Premier League return if his wages are increased.
He's a strong ball-winner, but he's had health issues in recent years and his tackling is hit and miss (23 tackles, 23 fouls this season).
Barcelona is reportedly tracking Real Sociedad goalkeeper Claudio Bravo, according to Mundo Deportivo via Football Espana.
Barca's two primary goalkeeper targets should be Marc-Andre ter Stegen and Thibaut Courtois.
If Mundo Deportivo's report is accurate, then Barca won't be too impressed by Bravo since all he has been doing is conceding goals (13 in his last five club games).
Paris Saint Germain midfielder Javier Pastore has called out media outlets for spreading rumours of him leaving the club.
"All these rumours are false and have nothing to do with the reality of the situation," Pastore said, from RMC via Sky Sports. "As I already said, I was the first to choose this club and I will be the last one to leave it."
Pastore has yet to score or create a goal in Ligue 1 this season.
Napoli may make a move for Barcelona central midfielder Alex Song, according to talkSPORT.
Song has played seven league games this season, but he started five of them and he's part of their midfield rotation.
He seems content playing that role and Barca should not sell him unless an absurd bid is lodged.
Real Madrid manager Carlo Ancelotti will ensure Xabi Alonso stays at the club.
"Xabi Alonso reminds me a bit of myself, although his passing is better and he has better technique as well," Ancelotti said, via Stefan Coerts at Goal.com. "I would like Xabi Alonso to sign a new deal as my Christmas present."
This all but ends speculation linking Alonso with a return to the Premier League.
Barcelona have dismissed reports linking them with Manchester City centre-forward Sergio Aguero.
"No, we have had no contact with him," Barcelona vice-president Josep Bartmoeu said, from Mundo Deportivo via Sky Sports. "I can say that the story is not true."
Aguero's last 10 games for City have produced the output you'd see on FIFA career mode: 12 goals and four assists.
Real Madrid manager Carlo Ancelotti says there is no problem between the club and Sergio Ramos amid rumours that the player has fallen out with Real president Florentino Perez.
"Everyone knows how important Ramos is, with his technical ability, his personality and for the history of this club," Ancelotti said, from AS via Dermot Corrigan at ESPN FC.
Ramos, who wants to stay at the club, admitted he disagreed with Perez but refused to elaborate, from AS via FOX Sports:
I'll repeat, our differences were nothing to do with the contract. I've got three years here and I'm relaxed and I'm not looking to leave.
I'm not going to talk about the differences between us because it's a personal matter, but I can say we have a great relationship. I'll never forget who the president here is and I know he's in charge.
I feel privileged and if I could, I would retire here.