Premier League Champions, Chelsea FC have agreed on a deal with Atletico Madrid in a bid to sign Diego Costa, according to reports.

The Brazillian-born striker Costa has been angling for a return to the Spanish club after being told – allegedly via text message – that he was no longer part of Antonio Conte’s plans at Chelsea.

Costa has refused to return to Chelsea this season after accusing the Blues of treating him like a ‘criminal’ and has been demanding they sell him to Atletico.

Now he looks to have got his wish with Atletico understood to have had an offer worth around €60million [£53million] accepted by the Premier League champions.

Diego Simeone’s side is currently banned from signing players after breaching FIFA rules regarding international transfers of players aged under 16.

But the ban ends in January and Costa will officially make the move back to Atletico when the transfer window re-opens in the New Year, subject to a successful medical.

The 28-year-old is expected to begin training with the LaLiga team immediately despite the deal not becoming official until 2018.

It will bring an end to a hugely successful Chelsea career for Costa, which saw him plunder 52 goals across three seasons and win two Premier League titles.

The striker has made an appearance of any kind in over 100 days and it is likely that by the time he next plays competitively, that number will have exceeded 200.

Atleti were reportedly keen to tie up the deal last week and were given encouragement by the English champions, who were said to have finally opened up to coming to the negotiating table.

However, talks stalled and reports emerged the striker did not return to London as scheduled, but it now appears an official agreement has been finalized.

Chelsea FC’s official website posted a very short article ‘The transfer will be subject to the agreement of personal terms and a medical’.