After his contract with Atletico Mineiro in Brazil expired, Chelsea legend Diego Costa became available on a free transfer. DIEGO COSTA is a free agent after his contract with Atletico Mineiro was terminated. Last season, the former Chelsea favourite joined the Brazilian side in the middle of their title-winning season. In 15 appearances, he scored four goals to help his team to victory. But he’ll be on the move again soon. “Diego Costa has agreed to terminate his contract with Atletico Mineiro and part ways with immediate effect,” Italian transfer expert Fabrizio Romano wrote on Twitter. (hashtag)transfers (hashtag)transfers (hashtag)transfer “The…