Chelsea striker Diego Costa could return to Atletico Madrid, Italy's Corriere dello Sport has reported.
The Spain international has endured one of his most difficult seasons at Chelsea and has been left out of Spain's provisional squad for Euro 2016.
He joined the Blues in the summer of 2014, scoring 36 goals in 78 appearances.
He scored 12 goals in the English Premier League this campaign as he struggled to replicate last season's form that helped the Blues lift the Premier League crown.
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