http://en.as.com/en/2016/07/17/football/1468780475_646122.html
The former Atlético striker is the club’s primary target. Costa has already told new Chelsea coach Antonio Conte that he wants to return to the Calderón and the board are willing to pay 60 million euros for a player sold to Stamford Bridge for around 40 million two years ago. However, Chelsea will not allow talks to proceed until they have found a replacement.