Nasri, 34, served an 18-month doping suspension from 2018, an episode that he said changed his way of seeing football.
"It was just an injection of vitamins because I was sick," the former Olympique de Marseille, Arsenal and Manchester City player, whose career effectively ended last year after a short stint at Anderlecht, told Le Journal du Dimanche newspaper.
He scored five goals for France and picked up 41 caps between 2007 and 2013. (Reporting by Julien Pretot; Editing by Hugh Lawson)
