
Mathieu Debuchy put pen to paper on a three-year contract with Saint-Etienne on Monday.
“I have really enjoyed these four months with Saint-Etienne,” said Debuchy in a statement.
“The presence of [head coach] Jean-Louis Gasset also played a role in my decision.”
Saint-Etienne’s Ligue 1 rivals Toulouse announced the return of Alain Casanova as head coach.
Casanova, who spent three years with the club as a player and was in charge between 2008 and 2015, replaces Mickael Debeve at the helm.