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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Liverpool have unveiled their new home kit for next season, sticking with the hugely popular retro styling of the current shirt.
The reputation of the Premier League means it is the most popular and one of the most watched leagues in the world.