Whilst Atletico Madrid are obviously keen to keep hold of their star players at the Vicente Calderon, top scorer Radamel Falcao has been a figure linked with an exit for some-time.
His performances this season for club and country have led to huge interest from Europe's top clubs with Real Madrid interested, Man City also, but Chelsea have been a team that have shown the most.
Roman Abramovich's side are now ready to firm up their initial interest with a massive money move for the player that would see him arrive in West London ready for next season.
The Russian billionaire is reportedly had enough of Fernando Torres' poor performances and is eager to partner Falcao with Demba Ba, who arrived from Newcastle United as the starting duo for 2013/2014.
Falcao has been on fire again this season and has already notched 22 goals in 21 appearances and his worth is not known, but Chelsea have a key bonus in the proposed offer.
Current Atleti keeper Thibaut Courtois, is enjoying a successful spell in Madrid and is likely to be added to any deal that the club offer.
Courtois had planned on returning to England following two seasons in Spain but with Chelsea and Abramovich's need for Falcao getting bigger, the Blues' owner is hoping Courtois' part in the deal will soften the blow for Atletico Madrid.