Chelsea striker Demba Ba could leave Chelsea in January after holding secret talks with a Turkish club and could be replaced by Porto striker Jackson Martinez who has hinted that he is ready to leave the Portuguese champions.

The Senegal international has struggled to get a game for Chelsea this season as he finds himself behind Fernando Torres and Samuel Eto'o. With Romelu Lukaku set to return next summer, after his loan spell with Everton comes to an end, Ba will be aware of how difficult it will be to gain regular action.

Arsenal were linked with the striker over the course of the summer while former club West Ham United are believed to be keen to bring him back to Upton Park as they struggle for goals without the injured Andy Carroll.

However, Fifa egent Ceylan Caliskan revealed that Ba has made it clear that he wants to move to Turkey.

"I talk closely with Demba Ba, he wants to play for a Turkish club but I can't comment on a transfer yet," revealed Caliskan, as quoted in the Express.

Besiktas, Galatasaray and Fenerbahce are all said to be keen on signing the 28-year-old who has struggled to make an impact at Stamford Bridge and has scored just two Premier League goals since joining from Newcastle in January.

While Ba seems intent on leaving, Chelsea may have already identified a perfect replacement as the west London club are reportedly interested in signing Martinez from Porto.

The Colombian has scored an impressive 43 goals in 53 appearances since moving to Porto from Mexican side Chiapas in the summer of 2012 but has suggested he is ready to move on.

"The years are passing and one day I hope to make a good transfer," he told Portuguese newspaper Record.

"It clearly depends on Porto, a club that sells its players so well. Leaving or staying depends on Porto but I will only go if there's something concrete."