Although he signed a new five-year contract at Porto in the summer, Hulk has made it clear that he eventually expects to move on to a bigger club and his form in Europe – with four goals in six Champions League games this season – has certainly caught the attention of a few. Paris St Germain might be the one candidate willing to countenance a €100m release clause Photograph: Miguel Riopa/AFP/Getty Images
With his contract set to expire in the summer and negotiations over a replacement having reached an impasse, De Rossi may be more open to a move away from the club he adores than at any other point in his career. With 70 Italy caps to his name, it is a safe bet that the world's leading sides would be interested Photograph: Paolo Bruno/Getty Images
Signed from FC Twente for just £3.5m last summer, Tioté's strength and capacity to break up play has been crucial to Newcastle's fast start to the season but now several Premier League rivals are circling. The Newcastle manager Alan Pardew has not completely ruled out departures in January, but warned would-be suitors that they would have to pay 'a hell of a lot of money' for key starters such as Tioté Photograph: Graham Stuart/AFP/Getty Images
Named Ajax's captain following the departure of Maarten Stekelenburg to Roma in the summer, Vertonghen could soon be following the goalkeeper out of the club if reports of interest from Manchester City, Tottenham and Arsenal were to be confirmed Photograph: Olaf Kraak/EPA
A key figure in Benfica's progress to the Champions League knock-out stages, Gaitán's future has been the subject of much speculation in Portugal – where many believe he already has a deal in place to join Manchester United, despite Benfica's statements to the contrary Photograph: Francisco Leong/AFP/Getty Images
Increasingly uncertain of a first-team place under André Villas-Boas, Lampard would not struggle to find another club should he decide to move on. Tottenham have been linked with a bid for the player in recent weeks, as have Real Madrid – coached by his former manager at Chelsea José Mourinho Photograph: Andrew Powell/Liverpool FC via Getty Images
A player who has been in prolific touch this season, scoring 14 goals in 15 Bundesliga games for FC Köln, Podolski has just 18 months left on his existing contract, and has been linked with a move to Arsenal – among others Photograph: Alexander Hassenstein/Bongarts/Getty Images
Dynamic and muscular, Rodwell has become a key figure in Everton's midfield and won his first England cap in the friendly win over Spain last November. He has also, as a consequence, caught the eye of leading clubs and in particular Manchester United – who will be seeking midfield reinforcements after Darren Fletcher was ruled out indefinitely Photograph: Michael Regan/Getty Images
Potential suitors may be put off by the Ghanaian winger's involvement in the Africa Cup of Nations – as well as the new one-year contract extension he recently signed at Marseille – but Ayew has caught the eye of numerous leading clubs during his club's run to the Champions League knock-out stages Photograph: Jean-Paul Pelissier/Reuters
With his contract in Los Angeles having expired on 31 December, Beckham is expected to return to Europe and most likely Paris St Germain – who have been open in their pursuit of the player but are yet to reach agreement with him on a deal Photograph: Brendon Thorne/Getty Images
After a superb start to life at Juventus, the fleet-footed Krasic's form tailed off in the second half of last season and he has failed to establish himself under the new manager Antonio Conte. With the manager's formations leaving little room for a traditional winger such as Krasic, the club are expected to cash in this January Photograph: Claudio Villa/Getty Images
The Argentinian's departure in January seems inevitable at this stage, so the real questions are which club he will join and on what terms. Milan have been most active in pursuing Tevez, but would prefer an initial loan deal with an option to buy in the summer. City would much rather a permanent deal but with Paris St Germain uninterested they may struggle to find an alternative suitor Photograph: Laurence Griffiths/Getty Images
Linked at different times with Arsenal, Manchester United and Real Madrid, M'Vila has established himself as arguably France's finest defensive midfielder – becoming a regular fixture in Laurent Blanc's national team Photograph: Thomas Bregardis/AFP/Getty Images
This has been a dismal year for Torres, who has scored just three goals in 25 games since joining Chelsea in January. The club may finally be ready to cut their losses on a player who cost them £50m when he joined from Liverpool – with Milan said to be considering the player as a potential alternative should their move for Tevez fall through Photograph: Lindsey Parnaby/EPA
Despite failing to live up to billing in his much-hyped head-to-head with Lionel Messi at the Club World Cup, Neymar remains an exceptional talent and very much at the forefront of several major clubs' thinking. He recently extended his contract with Santos to 2014, but that has done little to dampen speculation regarding an imminent move to Europe Photograph: Lintao Zhang/Getty Images
Sought by both Arsenal and Tottenham over the summer, Cahill has since made his first competitive start for England – against Bulgaria in September – though his club form has not always been consistent. Chelsea are now also understood to be interested and with the player's contract set to expire in the summer, this will be Bolton's last opportunity to get a fee for the player Photograph: Carl Recine/Action Images
Roma's second-top goalscorer last season, Borriello has fallen out of favour under the new manager, Luis Enrique, and is keen to move on. A powerful targetman, he has been linked with moves to Juventus or Marseille Photograph: Ettore Ferrari/EPA
The scorer of 25 goals in 32 league games for Lille last season, Sow was scouted by Arsenal as they pursued Gervinho last year and has indicated that he would be keen on a move to the Premier League. With 18 months left on his contract, the club may also reason that this would be the optimum time to sell – with Tottenham and Liverpool now also reported to be interested Photograph: Pascal Rossignol/Reuters
Long monitored by Arsenal, the Belgium international's dazzling performances over the last two seasons have seen him shoot to prominence – with just about every leading club in Europe linked with the player over the last six months. Hazard has said he is ready to move on – though Lille would prefer to keep hold of him until the summer Photograph: Michel Spingler/AP
Hurt by Chelsea's refusal to offer him a new two-year contract, Drogba may now seek to leave the club as soon as January. Even at 33 he has plenty of potential suitors across Europe, though he may opt for a lucrative move further afield – perhaps even following his Chelsea team-mate Nicolas Anelka to the Chinese Super League Photograph: Scott Heppell/AP
