It was reported that Atletico Madrid were still interested in signing the Spain international even after signing Frenchman Gameiro, but now it seems that the 'Rojiblancos' have ended their interest.
Chelsea are still on the hunt for a new striker, despite having Costa and Michy Batshuayi on their books. The west London club have seen a bid turned down for Romelu Lukaku from Everton, but are understood to be preparing a new offer.
All the rumours surrounding interest in Costa himself and potential transfer targets for Chelsea have left Costa unsettled, meaning that the forward may request to move away from Stamford Bridge anyway.
Whatever happens, I'm sure this is not the last we'll hear about Diego Costa this summer.