The Brazilian centre back only signed for the Turkish team last summer but Sambafoot report that he will now make the move back to his homeland.
Gremio are looking to strengthen their squad ahead of their Copa Libertadores campaign.
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Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.