CHELSEA face taking a £20million hit on their asking price for wantaway striker Diego Costa. Antonio Conte’s men value the Spaniard at £50m but his old club Atletico Madrid are only willing to cough up £30m. Maverick Costa still has a house in Madrid and is due to fly out there next week as he tries to force through a return. The Spain international, 28, is currently AWOL at his family home in Brazil. He said: “My destination is already set. I must return to Atletico Madrid next season. It turns out there is the impasse that Chelsea does not want to release me.