Borussia Dortmund accept striker Nelson Valdez is leaving the club.
The Paraguay international has agents in England speaking with interested clubs, where he has been offered to Sunderland and Fulham.
BVB coach Jurgen Klopp said: "For several days he was back training with us, his work is very good, but he will leave with us."
Need your Sunderland news fix? Click here for all Black Cats news and transfer rumours.