Diego Costa could return to Chelsea as early as Monday but future with Blues remains up in the air

DIEGO COSTA could return to Chelsea as early as Monday, according to reports.

The Blues striker has been AWOL in Brazil for four months as he tries to push through a move to Atletico Madrid.

The Spain frontman had recently not been seen in two weeks.

But recent images showed him driving his car in his home town of Logarto.

The 28-year-old was spotted in his Mercedes SUV, on the same day Blues chiefs moved his luxury Range Rover from the first-team car park at Cobham.

It was then dumped into the youth team area as the row between club and player continues with another bitter twist.

Costa is furious with the way Chelsea handled the transfer window.

And he still longs to return to the Vicente Calderon, where boss Diego Simeone has just penned a new deal which will keep him there until 2020.

Costa has already been out of action for the first month of this season, with Stamford Bridge manager Antonio Conte no longer considering him in his plans for the campaign ahead.

Recent reports had linked Costa with a shock loan move to Turkish side Besiktas.

But Atleti still hope to land the Premier League winner in a £40million January deal - when their own transfer ban ends.

The summer transfer window was one of the craziest we have seen.

Take a look at the most profitable transfers of all time.

And here are the Premier League players whose wages made them the most expensive per minute played.