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"Guingamp and Jocelyn Gourvennec have agreed in principle to an agreement that will lead to a new page being written in the history of the club," said a statement.
Gourvennec, who coached Guingamp from 2010-2016 and steered the Brittany side to a French Cup triumph, is scheduled to take over on what is believed to be a two-year deal on November 12.
Guingamp sit bottom of the table on seven points from 12 games ahead of this weekend's clash against Lyon.