Kone's move to Sunderland has been dogged by Lorient's allegations of foul play
The deal had been due to go through at the beginning of the month before Sam Allardyce cancelled the move.
Negotiations had been conducted before the window opened and Kone spent a week in Sunderland for medical tests and contract talks but the Black Cats pulled out at the last minute.
The English club's conduct led to Lorient threatening to send a formal protest to French footballing authorities.
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