In demand or out of favour, 50 players who could be on the move...

Some of football's top players could be switching clubs in January
It's that time of the year again.

The chaos of the winter transfer window is almost upon us as chairmen across the continent open their chequebooks, whether it's in search of the title, promotion, European qualification or just hoping to stave off relegation.

BBC Sport assesses 50 possible moves that could happen in January.

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Completed transfers in full
Stats correct up to 28 December.

Premier League

GABRIEL AGBONLAHOR (29, striker) Aston Villa

Linked with: Ah Ahli, Al Wasl

It seems 'Gabby' is surplus to requirements at Villa Park under Remi Garde. With the club bottom of the table, it could soon be time to start preparing for life in the Championship next season. Agbonlahor could be the first of many to depart and be taken off the wage bill.

SAIDO BERAHINO (22, striker) West Brom

Linked with: Chelsea, Tottenham

Tottenham failed with four bids in the summer and the striker then tweeted he would never play for the club again. He has done, but things haven't been quite right ever since. Having completed just one full 90 minutes all season, his time at Albion could be up in January.

RADAMEL FALCAO (29, striker) Chelsea - on loan from Monaco

Linked with: Columbus Crew, Fenerbahce

After a failed loan spell at Manchester United last season, former Chelsea boss Jose Mourinho thought he could get the best out of the Colombian once again. He was wrong. Falcao has managed to find the net just once this season and the Blues could be looking to cut their losses early.

Victor Wanyama, Kevin Mirallas, Jamie Vardy and Andros Townsend - who will move in the transfer window?
DWIGHT GAYLE (25, striker) Crystal Palace

Linked with: Bournemouth, Norwich

The Englishman's hat-trick in the League Cup against Charlton in September looked to be the start of something special and his club have kicked on to challenge for a European place, but Gayle himself has failed to cement a place in the starting XI because of the form of Connor Wickham.

GOKHAN INLER (31, midfielder) Leicester

Linked with: AC Milan, Schalke

The superb form of midfielders N'Golo Kante and Danny Drinkwater has seen Inler's chances at the shock Premier League challengers limited to just seven appearances. The Switzerland captain may feel he needs regular football going into Euro 2016 and a loan move could materialise.

BOJAN KRKIC (25, striker) Stoke

Linked with: Chelsea, Liverpool, Manchester United

The Spaniard, who joined from Barcelona, has had an impressive return to Premier League action after an injury-hit previous season. Although he has netted just five this term, his runs and movement have been a handful for opposition defenders. Big clubs have been watching.

KYLE LAFFERTY (28, striker) Norwich

Linked with: Leeds United, Palermo

After leading Northern Ireland to Euro 2016 qualification, Lafferty needs minutes on the pitch to make sure he stays in the squad for the tournament. Out of favour at Carrow Road having made just one appearance this season, he may look to drop down a division for much-needed game time.

SADIO MANE (23, winger) Southampton

Linked with: Bayern Munich, Manchester United

The speedy Senegalese winger has been the star of a Southampton team that hasn't really hit top form so far this season. Having seen their best players such as Adam Lallana, Luke Shaw and Morgan Schneiderlin leave over the last couple of seasons, Mane may well be the next in line to leave the south-coast club.

KEVIN MIRALLAS (28, winger) Everton

Linked with: AC Milan, Marseille, Monaco

Mirallas has found opportunities limited at Goodison Park this season, particularly because of the fabulous form of Spaniard Gerard Deulofeu. With a European Championship taking place in the summer, the Belgian will be wanting as many minutes on the pitch as he can get. A temporary move may be on the cards.

DAVID OSPINA (27, goalkeeper) Arsenal

Linked with: Besiktas
Ospina was always going to play second fiddle when Arsenal signed Petr Cech in the summer. The Colombian hasn't played since their shock 3-2 Champions League loss at home to Olympiakos.