​Atletico Madrid are preparing to re-sign Chelsea striker Diego Costa this week by putting in a bid for the Spain international to join in the January transfer window.

The La Liga side will make an offer in the region of £26m - which is £6m less than Chelsea paid for him in the summer of 2014. 

However, the Mirror have reported that with performance-related add-ons this fee could rise to around what Chelsea paid in the first instance. Atletico plan on making Costa the highest paid player at the club.

Costa previously revealed that Blues boss Antonio Conte told him he was surplus to requirements at Chelsea, via text.

"Antonio Conte has told me by message that I will not continue with Chelsea and that’s it," Costa said, as quoted by The Sun

"My relationship with the coach has been bad this season and it is clear that he does not want me on the team."

It is now thought that Conte would ideally like to see Costa depart from Stamford Bridge before the start of pre-season.

Atletico are currently serving a transfer ban which prevents them from any transfer dealings until January 2018 after FIFA-imposed sanctions were upheld by the Court of Arbitration for Sport.

It had been reported that Costa could be loaned to a Chinese club until he is able to play for the Spanish side, but he is now less keen on a move than he was six months ago.

Atletico will hope that they can convince Chelsea to keep Costa until January, and that he will be left out of their Champions League squad so he is not cup tied for the latter stages of the competition.