The decision comes after Marseille parted ways with Roberto De Zerbi, whose momentum faded after a successful debut season that ended with a second-place finish in Ligue 1. Alonso is reportedly unwilling to join what he considers an unstable environment, particularly with the departure of sporting director Medhi Benatia.
Marseille's search for a new manager continues, with Habib Beye and Sérgio Conceição among the names mentioned. The French club faces a wide-open managerial situation as they look to rebuild after a turbulent season.