Atletico Madrid are ready to offer Jackson Martinez to Chelsea in a desperate attempt to bring back Diego Costa to Calderon before the deadline day.

According to SunSport, Atletico manager Diego Simeone is very much interested in welcoming back unsettled Costa who has returned to his best now since Guus Hiddink took charge replacing Mourinho.

However, Chelsea are not in a mood to start any discussion because Costa and Martinez both would not be eligible to feature in the Champions League if the swap happens, and this is the main reason it is unlikely to happen in this transfer window.

Colombian ace Jackson Martinez hasn’t been able to prove his worth for Atletico since a £25m summer move from Porto and sources close to Atletico dressing room have revealed that Diego Costa speaks to his former teammates regularly and has a desire to return to the Spanish capital.

Atletico Madrid have been hit hard with a FIFA transfer ban which starts from next summer window But the club hierarchy have recently announced they will appeal against the ban and will take it all the way to the Court of Arbitration in a bid to suspend the sentence and be able to sign new players when the season ends.

It is believed if Atletico Madrid fail to bring in Diego Costa now, they be back in the race again in the summer, particularly if Simeone still stays on at Calderon.

Meanwhile, Costa has alleviated all the concerns over his fitness as he returned to training on Friday. The Chelsea striker had just seven goals since January 2015 before Jose Mourinho’s dramatic exit last month. But with new boss Hiddink in charge, the controversial forward now has six goals in his last 6 matches.

He had to leave the field early during last weekend’s clash against Arsenal with a knee injury which made him doubtful for Sunday’s match against the Championship team.

The Spanish striker managed to score the only goal to beat fierce rivals Arsenal but was then taken off in the second half with a knock, but the 27-year-old forward was spotted on Chelsea TV on his way out to training as his teammates prepared to face MK Dons in the FA Cup on Sunday.

According to some Spanish media reports, Diego Costa first wants Diego Simeone to guarantee him that he will be there with Atletico Madrid next season despite Chelsea’s repeated offers, only then he will leave Stamford Bridge.

The Chelsea striker, however, has been highly linked with a potential return to the Vicente Calderon since earlier in the summer when Spanish publication Marca reported, the striker was not happy with London’s lifestyle. But Atletico eventually closed the door on their target after turning all the attention instead to Jackson Martinez, spending around £25.7m to sign the Colombian international from Porto.